The present invention provides a hot rolled steel sheet for a tailored rolled blank said steel sheet having high tensile strength and excellent cold moldability. This hot rolled steel sheet has a chemical composition containing by mass% C Si Mn P S Al N and Ti wherein the balance comprises Fe and impurities and sati...

The present invention provides a steel wire provided with stable workability performance. This steel wire is wire having a steel component containing in mass% C in the amount of 0.20 0.60% Si in the amount of 0.15 0.30% Mn in the amount of 0.25 0.60% P in the amount of =0.020% and S in the amount of =0.010% with the...

The present invention is a spot welded joint formed by stacking a plurality of steel plates (1A, IB) and spot welding. The cross tension strength of the spot welded joint formed i s improved by obtaining a spot welded joint wherein at least one of the plurality of steel plates i s a high- strength steel plate havi...

This plated steel material has a steel material a plating layer that covers the surface of the steel material and an interface alloy layer formed at the boundary between the steel material and the plating layer wherein: the compositional makeup of the plating layer includes in mass% 20 83% Zn and 2.5 46.5% Al the re...

A steel sheet according to one embodiment of the present invention has a prescribed chemical composition. The structure of a portion comprising ?? of the sheet thickness includes expressed as volume fractions 30 70% of tempered martensite and a total of at least 20% but not more than 70% of ferrite and/or bainite. T...

This welding method is a flash butt welding method of a pair of track rail steel pieces, having: a preheating process in which electric current is made to flow for a predetermined time in a state in which the welding surfaces of a pair of track rail steel pieces are forcibly brought into contact with each other, and...

This structural member (10) is equipped with a hat member (1) and a closing plate (2). The hat member (1) has a top surface (1a); a pair of side walls (1b) extending from each end of the top surface (1a); and flanges (1c). The closing plate (2) is provided in contact with the pair of flanges (1c). Each of the pair o...

This electrical steel sheet (1) includes an electrical steel parent material (2) and an insulation coating (3) formed on the surface of the parent material (2). The insulation (3) coating contains at least one type of phosphate selected from the group consisting of Al Zn Mg and Ca. The ratio of the material amount (...

[Problem] To provide: a transportation equipment component capable of appropriately improving vibration properties; and a panel member exhibiting appropriately improved vibration properties. [Solution] This transportation equipment component is equipped with: a patch member (13) configured from a metal plate shaped...

The purpose of the present invention is to carry out press working by a free bending method on a blank comprising an ultra high-strength steel plate and manufacture a press component without cracks in a flange on the inside peripheral side of a curved part. A press component 11 having a hat shaped cross-sectional sh...

To more easily provide a galvanized steel sheet having excellent coating film adhesiveness after hot pressing. [Solution] This galvanized steel sheet comprises: a galvanized steel sheet being a base material; and a surface treated layer formed on at least one surface of the galvanized steel sheet. The surface treate...

This steel sheet has a specified chemical composition. In Fourier transform infrared spectroscopy using reflection absorption spectroscopy the surface exhibits an absorption peak with a reflectance of 50% to 85% inclusive in the wave number range of 1200 cm 1 to 1300 cm 1 and does not exhibit an absorption peak in t...

A threaded joint (1) consists of a pin (13) and a box (12). The pin (13) comprises a shoulder face (59) a seal face (56) and a male threaded portion (51). The box (12) comprises a shoulder face (24) a seal face (22) and a female threaded portion (21). The male threaded portion (51) and the female threaded portio...

2A hot formed member that has both a prescribed chemical composition and a metal structure which contains 10 to 40% by area of austenite and in which the total number density of grains of the austenite and martensite is 1.0 grain/µm or more and that exhibits a tensile strength of 900 to 1300MPa. ...

A device (500) for manufacturing a component with a hat shaped cross sectional surface is provided with: dies (502) that apply pressure to both side parts (601b 601c) of a base material metal plate (601); a punch (504) that applies pressure to a center part (601a) of the base material metal plate (601); a pad (503)...

The present invention provides a load applying device for a press-molding die, the load applying device being provided with: a rod which has a first end part, a second end part, and a flange; a stacked disc spring which is formed by stacking a plurality of disc springs having a center hole into which the first end...

Provided is austenitic stainless steel which has high strength and excellent hydrogen embrittlement resistance and which additionally has excellent machinability. Austenitic stainless steel according to one embodiment of the present invention has a chemical composition which contains in mass% 0.10% or less of C 1.0%...

Provided is a cold forged member which exhibits high cold forgeability and by which a high endurance ratio can be achieved by carrying out work hardening by means of cold forging and age hardening following cold forging the cold forged member being characterized by having a prescribed chemical composition and a soli...

Provided is a threaded joint for a steel pipe, the threaded joint being capable of ensuring excelling sealing performance and preventing the occurrence of crevice corrosion. The threaded joint is provided with a pin (10) and a box (20). The pin (10) includes a first shoulder surface (11), a first male threaded secti...

This soundproof wheel includes a soundproof device (3) which i s mounted to the inner peripheral surface (6) of the rim (5) of the wheel. The soundproof device (3) i s provided with: a stationary ring (10) which i s fitted in and affixed to a groove (8) formed in the inner peripheral surface (6) of the rim (5); an...

A grain oriented electromagnetic steel sheet according to one embodiment of the present invention is provided with a steel sheet and an insulating coating film. The insulating coating film contains: a first metal phosphate salt which is a metal phosphate salt of one or more metals selected from among Al Fe Mg Mn Ni ...

Provided is a hot- rolled steel sheet that: comprises a chemical compound containing, in mass% , 0.030- 0.10% of C , 0.5- 2.5% of Mn , 0.100- 2.5% of Si + Al; comprises by area ratio, 80% or more of ferrite, 3 -15.0% of martensite , and less than 3.0% of pyrite; has a number density of 5.0 grains/10000 µm or less of...

A gate valve for the inside of a high-temperature furnace includes: a granular sealant that is made to flow in a temperature range from room temperature to 900°C; a valve casing wherein the sealant is stored at a bottom portion thereof; a first duct which is connected to the valve casing and through which a gas f...

Provided is an arc welded joint having excellent fatigue strength in which the hardness of an upper layer of a weld toe portion is increased to suppress the occurrence of crack, and of which a heat-affected zone in a plate thickness direction is narrowed to suppress the development of crack. A method for manufacturi...

This heat-treated steel material has a chemical composition that contains, in mass%, 0 . 16-0.38% of C , 0.6-1 .5% of Mn, 0.4-2.0% of Cr, 0.01-0. 10% of Ti, 0.001-0.010% ofB, 0.20% or less of Si, 0.05% or less of P, 0.05% or less of S, 0.01% or less of N, 0-2.0% of Ni, 0-1 .0% of Cu, 0-1 .0% of Mo, 0-1 .0% of V , 0-...

Provided i s a steel component for mecnanical structural use having increased iatigue resistance and toughness without any reduction in machinability; also provided i s a manufacturing method for the same. A steel component i s formed fiOm steel which includes, i n mass%, 0.05-0.20% C , 0 . 10-1 .00% Si, 0.75-3.00...

A vacuum degassing tank includes a carbon-containing magnesia refractory material provided at least at a contact part of a refractory material which comes into contact with a molten slag, the carbon-containing magnesia refractory material contains 7 mass% or higher and less than 28 mass% of graphite, 3.5 mass% or...

The purpose of the present invention is to further reduce the size of a pneumatic caliper brake device and to reduce the load on sliding portions and rotary portions of brake levers. Base side end parts (7b) of first brake levers (7) are rotatably attached to: a tip of a rod (5a) of a pneumatic brake cylinder device...

This forged crankshaft manufacturing device processes forgings from which flash has been removed. At least a portion of a plurality of rough crank arm portions in a forging have excess material portions which protrude out from the outer periphery of the side portions of the rough crank arm portions. The manufacturin...

A laser machining device which is for subdividing the magnetic domains of an oriented electromagnetic steel sheet by condensing a laser beam and scanning same in a scanning direction at the oriented electromagnetic steel sheet wherein the laser beam condensed at the oriented electromagnetic steel sheet is linearly p...

The present invention provides a method for cooling a hot-rolled steel strip after a finishing rolling in which a transportation speed varies, the method including: setting a transportation-speed changing schedule on the basis of a temperature of a steel strip before the finishing rolling and a condition of the fini...

The present invention provides a fillet welded joint manufacturing method and a fillet welded joint that increase productivity without sacrificing the strength of fatigue fracture of welding structural elements. The fillet welded joint according to the present invention is formed by fillet welding at least two metal...

This stretch flange crack prediction method for predicting occurrence of stretch flange cracking at a flange end part when stretch flange forming is performed on a plastic plate wherein the method is provided with: a measured value acquisition step (S1) for acquiring a breaking strain measurement vertical strain gra...

Hot rolled steel according to an embodiment of the present invention has a prescribed chemical composition that includes 0.0001 0.0050 mass% of Bi; at least 90% by area of the metal structure consists of ferrite and pearlite; and the average number density of manganese sulfides as measured at a cross section paralle...

A shaped object formed by hot stamping the shaped object comprising a steel sheet (30) a first coating layer (10) formed by plating on a first main surface (31) of the steel sheet (30) and a second coating layer (20) formed by plating on a second main surface (32) of the steel sheet (30). The first coating layer (10...

Provided is a titanium alloy formed from by mass% 0.01 to 0.15% of a platinum group element 0.001 to 0.10% of a rare earth element and Ti and impurities as the balance. Preferably the alloy comprises by mass% 0.05 to 1.00% of Co in place of a portion of the Ti and preferably the platinum group element content is 0.0...

A cold-rolled steel sheet having a refined structure in which grain growth 1 during annealing is suppressed has a chemical composition containing, in mass percent, C: 0.01 - 0.3%, Si: 0.01 - 2.0%, Mn: 0.5 - 3.5%, Nb: 0 - 0.03%, Ti: 0 - 0.06%, V: 0 - 0.3%, sol. Al: 0 - 2.0%, Cr: 0 - 1.0%, Mo: 0 - 0.3%, B: 0 - 0.00...

Provided is a cooling device wherein water is drained appropriately to cope with even an increase in the water volume density of cooling water to thereby ensure high cooling capability. A cooling device is provided with a plurality of cooling nozzles which are disposed downstream from a hot finished rolling mill li...

A method for repairing an inside of a gas flue of a coke oven, which is for repairing a damaged portion in the gas flue of the coke oven includes a step of inserting and disposing a first pipe so that the first pipe maintains a predetermined gap with respect to an inner peripheral surface of the gas flue, and an ...

This high- strength steel sheet contains, in mass% , 0.01% to 0.2% carbon , 0 to 2.5% silicon 0 to 4.0% manganese 0 to 2.0% aluminum , 0 to 0.01% nitrogen, 0 to 2.0% copper , 0 to 2.0% nickel, 0 to 1.0% molybdenum , 0 to 0.3% vanadium , 0 to 2.0% chromium , 0 to 0.01% magnesium , 0 to 0.01% calcium, 0 to 0.1% rare -...

A method of continuous annealing/hot-dipping using a hot-dipping apparatus having an annealing furnace in which a silicon-containing steel sheet is hot-dipped. In this method, the silicon contained in the steel is caused to undergo internal oxidation without undergoing surface oxidation to thereby avoid a decreas...

Provided is an electromagnetic steel sheet (1) that comprises: a base material (2) for an electromagnetic steel; and an insulating coating film (3) that is formed on the surfaces of the base material (2). Three conditions (1.8 = 3[Fe]/[P] + Sn[M]/[P] = 3.6 0.6 = Sn[M]/[P] = 2.4 and 0.6 = 3[Fe]/[P] = 2.4) are satisfi...

An inductive heating device for a metal strip provided with: an induction coil provided on one or both sides in the plate thickness direction of a metal strip travelling in the longitudinal direction the induction coil forming in the metal strip an induction current forming a closed loop as viewed from the plate thi...

This magnetic steel sheet (1) includes a magnetic steel matrix (2) and an insulating coating (3) formed on the surface of the matrix (2) and containing a polyvalent metal phosphate and Fe. In a region extending to a second depth from a first depth from the surface of the insulating coating (3) the maximum value of a...

2This on line plating adhesion determination device for a galvannealed steel sheet is provided with an X ray tube for irradiating X rays toward a galvannealed steel sheet traveling on a conveyor line an optical system for irradiating the X rays emitted from the X ray tube onto the galvannealed steel sheet as a para...

Provided is a pre coated metal plate comprising: a metal plate; an underlying film layer which does not contain chromate and which is provided on the metal plate; a primer film layer which does not contain chromate and which is provided on the underlying film layer; and a top film layer which is provided on the prim...

Provided is an austenitic stainless steel having excellent strength ductility and weldability. This austenitic stainless steel has a chemical composition that contains in mass% 0.005 0.07% of C 0.1 1.2% of Si 3.2 6.5% of Mn 9 14% of Ni 0.005% or more but less than 3% of Cu and/or Co in total 19 24% of Cr 1 4% of Mo ...

A chemical conversion treated steel sheet according to the present invention comprises a steel sheet a matte finished Sn plating layer comprising ß Sn provided as an upper layer on the steel sheet and a chemical conversion treated overcoat layer provided as an upper layer on the Sn plating layer wherein the Sn plati...

Disclosed is a welding material for austenitic heat resistant steel which has a chemical composition that contains more than 0.05% but 0.18% or less of C 0.5% or less of Si 1.5% or less of Mn 40 50% of Ni 20 25% of Cr more than 8.0% but 13.0% or less of W 0.01 0.2% of Ti more than 0.03% but 0.20% or less of N and 0....

Provided is a spring steel that ultimately forms a high strength spring by maximizing a temper softening resistance effect achieved by alloying elements while suppressing the generation of a SiO hard inclusion or the occurrence of decarbonization which cause a deterioration in the fatigue characteristics of a spring...

The present invention addresses the problem of minimizing breakage due to cracking associated with a HAZ softening region during generally circular laser lap welding as a substitute for resistance spot welding in order to lap a plurality of steel sheets including high strength steel plates. It was discovered that ...

Provided is a method for estimating surface shape defect regions that estimates regions where a surface shape defect will occur in a plastic worked article obtained by plastic working a workpiece. The method for estimating surface shape defect generating regions comprises a step of obtaining a first stress distribut...

A Ni -plated steel sheet according to the present invention comprises a steel sheet, a first Ni plating layer which is formed on at least one surface of the steel sheet and contains Ni , and a second Ni plating layer which is formed on the first Ni plating layer and contains Ni ,wherein the average center line rough...

Provided is an induction hardening steel with a high level of quenching crack resistance. The induction hardening steel of the present invention contains: C: 0.35% to 0.6%; Si: 0.01% to less than 0.40%; Mn: 1.0% to 2.0%; S: more than 0.010% to 0.05%; Cr: 0.01% ~ 0.5%; Al: 0.001% ~ 0.05%; N: Ti / 3.4% ~ 0.02%; and Ti...

[Problem] To provide a plated steel sheet having excellent heat resistance and productivity and a method for manufacturing the same. [Solution] According to one aspect of the present invention there is provided a plated steel sheet characterized in that: the plated steel sheet has a steel sheet and an alloy plating ...

Provided are: an alloyed hot dip zinc coated steel sheet that as an alloyed hot dip zinc coated steel sheet that uses a high strength steel sheet as the parent material reliably and sufficiently increases the adhesion of the coating layer to the parent material steel sheet; and a method for producing the alloyed hot...

The present invention is a method of friction welding of metal members characterized by initiating friction welding in a state in which insert material formed from a metal having a melting point (temperature in Celsius) of 60  80% of the melting point (temperature in Celsius) of a metal member is inserted between jo...

There is provided steel for wheel having a chemical composition consisting of, by mass percent, C: 0.65 to 0.84%, Si: 0.02 to 1.00%, Mn: 0.50 to 1.90%, Cr 0.02 to 0.50%, V: 0.02 to 0.20%, and S: 0.04% or less, in which 34 * 2.7 + 29.5 xC + 2.9 x Si + 6.9 x Mn + 10.8 x Cr + 30.3 x Mo + 44.3 x V £ 43, and 0.76 x ex...

A formed member is provided which can be manufactured at a low cost, which has excellent dimensional accuracy, which has excellent axial crushing properties and three-point bending properties, which has excellent bending stiffness and torsional stiffness, and which is suitable for use in a component of an automob...

A high carbon steel sheet has a chemical composition comprising in % by mass 0.60% to 0.90% of C 0.30% to 1.50% of Mn 0.20% to 1.00% of Cr and others and has such a structure that the concentration of Mn contained in cementite is 2 to 8% inclusive the concentration of Cr contained in the cementite is 2 to 8% i...

A high strength steel material for oil well use having: a chemical composition which contains in mass% 0.60 to 1.4% of C 0.05 to 1.00% of Si 12 to 25% of Mn 0.003 to 0.06% of Al at most 0.03% of P at most 0.03% of S less than 0.1% of N 0 to less than 5.0% of Cr 0 to less than 3.0% of Mo 0 to less than 1.0% of Cu 0 t...

This high strength steel sheet having superior moldability while securing the high strength of a maximum tensile strength of at least 900 MPa is characterized by having a predetermined component composition the steel sheet structure containing a ferrite phase and an austenite phase the ratio of bcc iron and unaligne...

Disclosed is a welding material for an Ni based heat resistant alloy which has a chemical composition that contains 0.06 0.18% of C 0.5% or less of Si 1.5% or less of Mn 46 56% of Ni 10 15% of Co 20 25% of Cr more than 10.0% but 14.0% or less of Mo 0.01 0.5% of Ti 0.1 1.0% of Al and 0.006% or less of N and additiona...

A device (500) for manufacturing a component having a hat shaped cross section is provided with: a die (502) having a shaping surface which sandwiches and applies pressure to a stock metal sheet (601); a blank holder (505) disposed facing the die (502) and having a shaping surface which sandwiches and applies pressu...

This pipe threaded joint (1) is provided with a pin (5) and a box (8). The pin (5) and the box (8) are each provided with a contact surface having threaded parts (4 7) and a non threaded metal contact part. The pipe threaded joint (1) is provided with a solid lubricating coating (21) containing a binder a lubricatin...

This chemical conversion treated steel sheet is equipped with: a steel sheet; a composite plating layer formed on at least one surface of the steel sheet, containing Ni in the amount of 2-200 mg/m2, measured by metal Ni amount, and Sn in the amount of 0.1-10 g/m2, measured by metal Sn amount, and having an island-sh...

The disclosed production method includes a die forging step of obtaining a forged blank (30) with flash (B) having a crankshaft shape, and a trimming step of removing the flash (B) from the forged blank (30) while nipping the forged blank with a pair of holding dies (1 0). In the forged blank (30), at least one o...

A surface treated steel sheet for a fuel tank wherein the surface treated steel sheet for a fuel tank is provided with a Zn plating layer or a Zn Ni alloy plating layer formed on at least the surface of the steel sheet used as a fuel tank inner surface and a chromate free chemical conversion coating layer containing...

The rod steel according to one embodiment of the present invention has a given chemical composition and satisfies the following: the cross sectional quench hardening deviation is 1.5 mm or less and the ?max and the ?min are 1.5 mm or less a surface layer region thereof has a structure consisting of 10% by area or ...

The main purpose of the present invention is to provide a secondary cooling control method for a continuous casting machine such that it is possible to improve the accuracy of controlling the overall surface temperature of a cast slab to a predetermined target temperature. The present invention has a cast slab surfa...

A hollow columnar shock absorbing member (1) having an axis line (O) a plurality of rectangular walls (1a 1b 1c 1d) extending parallel to the axis line and a polygonal cross section perpendicular to the axis line (O) said shock absorbing member (1) extending in the direction of the axis line (O) and absorbing extern...

A high-strength non-oriented electrical steel sheet contains: in mass%, C: 0.010% or less; Si: not less than 2.0% nor more than 4.0%; Mn: not less than 0.05% nor more than 0.50%; Al: not less than 0.2% nor : more than 3.0%; N: 0.005% or less; S: not less than 0.005% nor more than 0.030%; and Cu: not less than ...

To provide a hot dip galvanized steel sheet that inhibits in a simple manner excessive generation of zinc oxide on a surface layer after hot pressing and that has superior corrosion resistance at an unpainted portion. [Solution] A hot dip galvanized steel sheet according to the present invention comprises a base ste...

A steel sheet shape control method includes, (A) setting a target correction shape of the steel sheet at a position of an electromagnet to a curved shape, (B) measuring a steel sheet shape when electromagnetic correction is performed, (C) calculating the steel sheet shape in a nozzle position based on the steel s...

There is provided an antioxidant agent excellent in antidripping property and anti-peeling property. The antioxidant agent in accordance with the present invention contains a plurality of glass frits having different softening points, potter"s clay, and bentonite and/or sepiolite. On account of the potter"s cla...

A press molding step in which a press molded article is obtained from a blank (300) from a steel sheet having a high tensile strength of at least 390 MPa said article having a cross sectional shape having at least a groove bottom section (101) a ridge section (102) and a vertical wall section(103). An outward flange...

A steel strip i s formed by subjecting steel having a predetermined compos jected to first cold rolling, the steel strip i s then subjected to intermediate annealing, the rolling, and the steel strip i s then subjected to finish annealing. The finishing temperature 900 °C . N o annealing i s performed between the...

In the present invention a plurality of water deflecting nozzles of a water deflecting device comprise one or more solitary distal water deflecting nozzles or distal water deflecting nozzle groups. The solitary distant water deflecting nozzles form distal end unit water deflecting regions that do not comprise one en...

[Problem] To provide an ultrasonic flaw detection method and ultrasonic array probe capable of easily detecting flaws near the surface of an object under examination. [Solution] This array probe (3) is provided with an array probe body (32) having multiple oscillators arranged in a straight line. The array probe (3)...

Provided is a threaded joint for an oil well pipe with which it is possible to suppress the increase in torque when a pin and a box are linked in a cold region. The threaded joint (1) for an oil well pipe of the present embodiment is provided with a pin (2) and a box (3). The pin (2) and the box (3) have respective ...

An inner punch (11), an outer punch (12) and a die (13) are arranged on the same central axis (10). The outer punch (12) is arranged so as to leave a first space (S1), which is bigger than the plate thickness (T) of a cup vertical wall section (A2) , from the inner punch (11) in the radial direction perpendicular to...

[Object] There are provided a method for removing metal fiimes inside a snout and a device for removing metal fumes inside a snout in a continuous hot-dip plating plant, 5 which are capable of reliably removing metal fumes causing unplating from the snout without heating an outer wall of the snout. [Solution] He...

Provided is a low-alloy steel pipe for an oil well, which has a yield strength of 827MPa or more, and excellent SCC resistance. This low-alloy steel pipe for an oil well includes, in mass%, C: over 0.35 and up to 0.65%, Si: 0.05-0.50%, Mn: 0.10-1.00%, Cr: 0.40-1.50%, Mo: 0.50-2.00%, V: 0.05-0.25%, Nb: 0.01-0.04%, so...

This metal pipe having a thickened end portion comprises: a thin walled portion having a wall thickness t when viewed in the longitudinal direction of the pipe; a first thickened portion having a wall thickness T larger than t provided at one end of the pipe; and a first tapered portion which is provided between the...

The present invention is: a steel for carburizing; and a carburized steel component that is provided with a steel section and a carburized layer formed on the outside surface of the steel section and having a thickness of over 0.4 mm and less than 2 mm. The chemical components of the steel for carburizing and the st...

The present invention provides a gear having dedendum bending strength enhanced by preventing a bending stress from becoming locally high at the dedendum during power transmission. The radius of curvature is the maximum at the critical cross sectional position determined by Hofer s 30° tangent method. The radii of c...

This plated steel sheet containing a quasicrystal is provided with a steel sheet and a metal coating layer disposed at the surface of the steel sheet. The chemical components of the metal coating layer include Mg Zn and Al and in at% 25% = Zn + Al is satisfied. The metal structure of the metal coating layer contains...

To provide a surface treatment agent for zinc plated steel sheets said agent satisfying all of corrosion resistance adhesiveness with top coat paints blackening resistance and adhesiveness with structural adhesives. [Solution] This water based surface treatment agent for zinc plated steel sheets said surface treatme...

A high strength cold rolled steel sheet having a chemical composition in terms of mass% of 0.050 0.40% C 0.01 3.0% Si 1.0 5.0% Mn 0.001 1.0% soluble Al 0.005 0.20% Ti 0.0005 0.010% B 0.1% or less of P 0.01% or less of S 0.1% or less of O 0.01% or less of N 0 1.0% Cr 0 1.0% Mo 0 1.0% Ni 0 1.0% Cu 0 0.50% Sn 0 0.20% N...

A surface treated steel sheet for a fuel tank having a Zn Ni alloy plated layer and a trivalent chromate film layer or chromate free film layer formed thereon on one surface or both surfaces of a steel sheet wherein the steel sheet contains in terms of mass% C: 0.0005 0.0050% Si: 0.01 1.00% Mn: 0.70 2.00% P: 0.060% ...

Provided is an insulating coating film for an electromagnetic steel sheet the coating film being formed on a surface of a base material of an electromagnetic steel sheet wherein the insulating coating film contains a phosphate of at least one type of polyvalent metal selected from among Al Zn Mg and Ca a divalent me...

This steel sheet for a container is provided with a steel sheet an Ni plating layer formed on at least one surface of the steel sheet and a chemically converted coating layer formed on the Ni plating layer wherein the Ni plating layer contains 10 1000 mg/m2 of Ni in terms of the metallic Ni amount and the chemically...

To provide a cooling method for strip steel in an alloying furnace that can establish both productivity and quality while mist cooling the strip steel in a cooling zone in an alloying furnace. [Solution] Mist is sprayed on strip steel passing through cooling equipment such that the amount of mist sprayed at the ed...

The main purpose of the present invention is to provide a method for manufacturing a steel in which Cu-Sn coexist, said steel maintaining an excellent surface quality even when hot-rolled. The present invention involves continuously casting a molten steel that contains, by mass%, C: 0.04-0.20%, Si: 0.05-1.00%, Mn: 0...

This high strength zinc plated steel sheet and high strength steel sheet having superior moldability and obtaining superior ductility and stretch flanging properties while securing the high strength of a maximum tensile strength of at least 900 MPa have a predetermined component composition the steel sheet structure...

A hollow columnar shock absorbing member (1) having an axis line (O) a plurality of rectangular walls (1a 1b 1c 1d) extending parallel to the axis line and a polygonal cross section perpendicular to the axis line (O) said shock absorbing member (1) extending in the direction of the axis line (O) and absorbing extern...

This device for producing a coated steel sheet is provided with: blow off unit (11) that blows gas against excess coating material (9x) accumulated along the edge of a steel sheet (8) passing along in one direction thus eliminating the excess coating material; and a coating material recovery unit (12) that recovers ...

The shape of an arm section (A) of a crank shaft is asymmetrical relative to a boundary line being an arm section center line (Ac) that connects the axis center of a pin section (P) and the axis center of a journal section (J). The flexural rigidity of the arm section (A) is greatest at the time that the load caused...

A threaded coupling is configured of a pin (10) and a box (20). The pin (10) is provided in order from the pipe main body of the pin (10) toward the distal end with a male threaded part (11) and a lip part (12) including a seal surface (13) and the box (20) is provided with a female threaded part (21) corresponding ...

This cast crankshaft manufacturing method includes a preliminary molding step for molding a burr free rough raw material (31) formed in the shape of a crankshaft having excess portions (Aaa Aba) that protrude from the outer periphery at both sides in the vicinity of a pin section (P) of a crank arm section (A); a di...

Provided is a low-alloy steel pipe for an oil well that has a yield stress of 965 MPa (140 ksi) or higher and that makes it possible to stably obtain excellent SSC resistance. The low-alloy steel pipe for an oil well is provided with a structure that comprises: a chemical composition that contains, in mass%, 0.40-0....

This structure design support device is equipped with: an evaluation point information acquisition unit which acquires evaluation point information regarding evaluation points set on a structure comprising multiple components said information indicating the positions of the evaluation points in a first state the pos...

This hot rolled steel sheet has a chemical composition that contains in terms of mass% 0.03 0.2% C 0.1 3.0% Mn up to 0.10% P up to 0.03% S 0.2 3.0% the sum of Al and Si more than 0% but not more than 0.01% N and more than 0% but not more than 0.01% O with the remainder comprising iron and impurities and has a micros...

Provided is secondary cooling method in which a coolant is sprayed in a fan shaped manner from a spray port of a spray nozzle towards a cast piece cast by a continuous casting device to cool said cast piece during continuous casting said secondary cooling method wherein the central axis of a spray direction of the s...

A crank shaft comprising a journal section (J) forming a center axis of rotation a pin section (P) eccentric relative to this journal section (J) and a crank arm section (A) that connects the journal section (J) and the pin section (P). A load caused by combustion pressure is applied to the pin section (P) via a con...

This noise damped wheel includes a noise damping device (3) mounted to the inner peripheral surface (6) of the rim (5) of the wheel. The noise damping device (3) is provided with: a stationary ring (10) fitted in and affixed to a groove (8) formed in the inner peripheral surface (6); a first elastic body section (11...

A continuous casting apparatus for steel includes: a casting mold for casting a molten steel with a pair of long side walls and a pair of short side walls; a submerged entry nozzle which discharges the molten steel into the casting mold; and an electromagnetic stirring device which is disposed along each external...

This eddy current deceleration device comprises: a magnet holding member that is provided coaxially with a rotary shaft and that holds a plurality of permanent magnets along the circumferential direction; a brake member that is supported so as to be relatively rotatable with respect to the rotary shaft the brake mem...

A cold rolled steel sheet which contains in mass% 0.0005 to 0.0045% of C 0.80 to 2.50% of Mn 0.002 to 0.150% of Ti and 0.0005 to 0.01% of B fulfills the requirement represented by formula (1) and also contains iron and unavoidable impurities as a remainder wherein the random strength ratio (A) in the [332] <110> ori...

Provided is a steel oil well pipe which has excellent sulfide stress cracking resistance (SSC resistance). A steel oil well pipe of the present invention contains in mass% 0.15 0.35% of C 0.1 0.75% of Si 0.1 1.0% of Mn 0.1 1.7% of Cr 0.1 1.2% of Mo 0.01 0.05% of Ti 0.010 0.030% of Nb 0.01 0.1% of Al 0.03% or less of...

This fluid type deceleration device comprises: a rotary disk provided to a rotary shaft; a rotary housing rotatably supported by the rotary shaft and including a pair of disk parts and a cylindrical part that connects the respective outer peripheral parts of the disk parts together in a manner so as to surround the ...

This crankshaft is provided with a journal part (J) as a rotational center axis a pin part (P) eccentric relative to the journal part (J) a crank arm part (A) joining the journal part (J) and the pin part (P) and a counter weight part (W) integrated with the crank arm part (A) the pin part (P) side surface of the cr...

A high-strength cold-rolled steel sheet having excellent stretch flangeability and precision punchability containing predetermined components and a balance being composed of iron and inevitable impurities, 5 in which in a range of 5/8 to 3/8 in sheet thickness from the surface of the steel sheet, an average valu...

When two high strength steel sheets (1A,1B) having a sheet thickness ratio of 2 to 5 inclusive and both having a tension strength of 780 MPa to 1850 MPa inclusive are overlapped with each other and resistance spot welding is performed a first energizing process that is a preliminary energization with an applied pres...

A cold rolled steel sheet according to the present invention contains specific chemical components wherein the metallic structure of the steel sheet comprises ferrite at an area ratio ranging from 30 to 90% martensite at an area ratio of 0% or more and less than 20% perlite at an area ratio ranging from 0 to 10% ret...

A lap welded member formed by joining lapped parts of a plurality of steel sheet members at a spot welding part (10) wherein: at least one of the steel sheet members contains martensite; and the spot welding part (10) comprises a nugget (12) formed by spot welding a heat affected part formed around the nugget (12) a...

This high strength steel sheet which has superior impact resistance and a maximum tensile strength of at least 900 MPa has a steel sheet structure containing C Si Mn P S Al Ti N and O in predetermined quantities the remainder comprising iron and unavoidable impurities; 1 8% by volume fraction of residual austenite i...

The present invention provides a high-strength galvanized steel sheet with maximum tensile strength of 900 MPa or more. The high-strength galvanized steel sheet has an alloyed galvanized layer formed on a surface of 5 a base steel sheet containing predetermined amounts of C, Si, Mn, P, S, Al, N, O with a balance...

A steel sheet for hot pressing use has a predetermined chemical composition containing 0.08% or more and less than 0.20% of C 0.003 to 0.2% of Si 1.6 to 3.5% of Mn and the like and has a steel structure composed of in area ratios 1 to 95% of bainite 5 to 94% of ferrite and a remainder made up by at least one compone...

A surface treated hot dipped steel material comprises a steel material and a coating material formed on the surface of the steel material wherein the coating material comprises a plating layer and a coating film formed on the surface of the plating layer and comprising an organic resin in this order when observed fr...

When hot press stamping a thin steel sheet K when cooling the thin steel sheet K by supplying a refrigerant to an ejection hole (27) that is communicated with a supply path (28) inside a lower mold (12) carried out is precooling in which the ejection amount per unit time of refrigerant from the ejection hole (27) is...

In this exhaust gas treatment method exhaust gas generated in an electric furnace is guided into a slag holding furnace and by supplying an oxygen containing gas into the slag holding furnace the combustible component in the exhaust gas is combusted; the exhaust gas after combustion is guided from the slag holding f...

Provided is a composition for forming a lubricant film on a tubular threaded fitting the composition being characterized by containing melamine cyanurate a basic aromatic organic acid metal salt and at least one species selected from: a pine resin based material; wax; a metal soap; and a lubricating powder. ...

The coating film for this coated steel plate comprises a silicate and melamine. In this coating film, the Si content SiTS of the outermost layer, the Si content SiS of the surface layer, and the Si content SiB of the body layer simultaneously satisfy the relationships SiB < SiS < SiTS, 7.0 ≤ SiS ≤ 50 and 7.0 ≤ SiTS/...

The product i s taken o f a coefficient (Bi) and central axis vertical sectional areas ( Si , S 2) of dust source search r e gions relating t o evaluation points (iM , ) at a coordinate point (p) in first and second generation source search regions (g ( M, it), g i )) having a central axis extending t o the windwa...

A zinc plated steel sheet for hot press molding which comprises a steel sheet and a zinc plating film formed on the surface of the steel sheet wherein the steel sheet has a chemical composition containing in mass% 0.02 to 0.58% of C 0.5 to 3.0% of Mn 0.005 to 1.0% of sol.Al optional specific components 2.0% or less ...

An induction-hardening steel having the following chemical composition, in mass%: C=0.45-0.85%; Si=0. 01-0.80%; Mn=0.1-1 .5%; Al=0.01-0.05%; REM=0.0001-0.050%; 0=0.0001-0.0030%; Ti=less than 0.005%; N=0.015% or less; P=0.03% or less; S=0.01% or less; and with iron and impurities constituting the remainder. Further...

THIS NON-ORIENTED ELECTROMAGNENC STEEL SHEET CONTAINS, IN MASS%, FROM 0.0001% T O 0.0040% (INCLUSIVE) OF C , MORE THAN 3.0% BUT 3.7% OR LESS OF SI, FROM 0.3% T O 1.0% (INCLUSIVE) OF SOL. AL, FROM 0.5% T O 1.5% (INCLUSIVE) OF MN, FROM 0.005% TO 0 . 1% (INCLUSIVE) O F SN, FROM 0.0001% T O 0.0030% (INCLUSIVE) OF TI, ...

This medium carbon steel sheet contains 0.10 0.80% of C 0.01 0.3% of Si 0.3 2.0% of Mn 0.001 0.03% of P 0.0001 0.01% of S 0.001 0.10% of Al and 0.001 0.01% of N (percentages given with respect to weight); the average carbide diameter is 0.4 µm or less; the ratio of the number of carbides that are 1.5 times or greate...

A medium carbon steel sheet for cold working has a hardness of 500 to 900 HV inclusive when the steel sheet is subjected to a high frequency quenching in such a manner that the temperature of the steel sheet is raised at an average heating rate of 100°C/sec the temperature of the steel sheet is then held at 1000°C f...

A steel material comprises a chemical composition represented by in mass % C: 0.050 0.35% Si: 0.50 3.0% Mn: over 3.0% and up to 7.5% P: 0.05% or less S: 0.01% or less sol. Al: 0.001 3.0% N: 0.01% or less V: 0 1.0% Ti: 0 1.0% Nb: 0 1.0% Cr: 0 1.0% Mo: 0 1.0% Cu: 0 1.0% Ni: 0 1.0% Ca: 0 0.01% Mg: 0 0.01% REM: 0 0.01% ...

This joining structure is provided with a first metal plate and a pair of second metal plates. An end surface of one of the second metal plates and an end surface of the other second metal plate face each other each of the pair of second metal plates is superimposed on the first metal plate and the end surfaces that...

This automobile member has a closed cross section including joint portions in which edge portions of two side walls of an inner panel are joined with edge portions of two side walls of an outer panel, in which in a first region, a first region outer height ho1 and a first region inner height ho have a constant va...

The present invention produces a curved article (10) having a hat shaped cross section by means of press molding without generating cracks or wrinkles. When producing by means of press molding a curved article (10) having a roughly hat shaped cross section comprising a top plate (11) vertical walls (12a, 12b) extend...

This grain oriented electromagnetic steel sheet is provided with a steel layer and an insulating coating film that is arranged directly on the steel layer. The steel layer contains as chemical components in mass% 2.9 4.0% of Si 2.0 4.0% of Mn 0 0.20% of Sn and 0 0.20% of Sb. With respect to the steel layer the silic...

A line displacement evaluation method that evaluates line displacement that occurs in a press molded article during press molding whereby character lines are molded. The line displacement evaluation method is characterized by having: a cross section profile acquisition step in which a cross section profile of the pr...

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Provided is a negative electrode active substance material that can improve the capacity per volume and charge discharge cycle characteristics of a nonaqueous electrolyte secondary cell such as a lithium ion secondary cell. The negative electrode active substance material according to the present embodiment contains...

A wire material having a tensile strength of 900 to 1300 MPa and adapted for use in manufacturing a non refined machine component wherein the wire material contains 0.20 to 0.50 wt% of C 0.05 to 2.0 wt% of Si and 0.20 to 1.0 wt% of Mn; is limited to 0.030% or less of P 0.030% or less of S and 0.005% or less of N; an...

A composite structure steel sheet which contains in terms of mass%, 0.01-0.1% C, 0.2-3% Mn, 0.04-1.5% Al, 0.015 0.2% Ti, up to 0.01% P, up to 0.005% S, and up to 0.01% N, satisfies [Ti]-48/14×[N]-48/32×[S]=0% and satisfies 0.00KEx.C (%)/fsd (%)=0.01, where Ex.C (%) = [C]-12/48×{[Ti]+48/93×[Nb]-48/14×[N]-48/32×[S]} w...

In the present invention a threaded joint for a steel pipe is provided with: a pin having an male thread formed of a two stage thread and a sealing surface comprising a tapered surface and curved surface formed at an intermediate part of the two stage thread; and a box having a female thread formed of a two stage th...

A seamless steel pipe comprises a specific carbide that has an equivalent carbon content (Ceq) of 0.50 to 0.58% contains Mo in an amount of 50 mass% or more contains V additionally contains one or two components selected from the group consisting of Ti and Nb and has a size of 20 nm or more.

This composition for use in forming a solid coating film comprises a pulverous organic resin at least partial soluble in dipolar aprotic solvents which is contained in a mixed solvent containing water and a dipolar aprotic solvent wherein the pulverous organic resin is in a dissolved state or a dispersed state in th...

Provided are a steel sheet that has a hot dip galvanized layer and that exhibits superior plating wettability and plating adhesion and a production method therefor. A steel sheet containing readily oxidizable elements including Si and Mn is used as a base material. The hot dip galvanized steel sheet has a hot dip ga...

This surface temperature measurement device (100) is provided with: a radiation thermometer (1) for detecting heat radiation light radiated from the surface of a workpiece (W) that is being water cooled; a housing (2) which opens on a workpiece (W) side and which internally accommodates at least the light receiving ...

This steel sheet member combination structure is provided with: a first steel sheet member which has a main wall part, erect wall parts erected from edges of the main wall part, and flange parts extending parallel to the main wall part from edges of the erect wall parts; a second steel sheet member which is joined t...

This threaded coupling for steel pipes comprises: a box being an opening end of a second pipe material; and a circular truncated cone shaped pin being one end of a first pipe material and into which the box is inserted. The pin has a male screw section being a tapered screw and a seal section including a tapered sur...

The present invention suppresses the breakage of the edges of ridgeline part flanges (7a 7b) and wrinkling around the roots of the ridgeline part flanges while suppressing the increase of the load on a pad when a structural member (1) made of a high tensile steel sheet or a steel sheet with a large thickness having ...

The present invention provides a galvanized steel sheet having excellent plating wettability and plating adhesion even when the base steel sheet contains Si and Mn, and provides a manufacturing method therefor. The galvanized steel sheet pertaining to the present invention includes a base steel plate containing ...

Provided is a structural member for an automobile body the structural member having a groove section in the top plate section thereof and having a substantially groove shaped cross section the groove section enabling the structural member to effectively exhibit the effect of improved energy absorption efficiency and...

The present invention suppresses wrinkles in ridge parts (12a 12b) and cracks in an outwardly directed continuous flange (16) during the molding of a press molded body (10) that has an approximately groove shaped cross section that has the outwardly directed continuous flange (16) provided thereto and that is made f...

A roll forming device for roll forming for the purpose of manufacturing shaped steel the cross sectional shape of which changes in the longitudinal direction is equipped with: first die rolls having an annular ridge part the cross sectional shape of which changes in the circumferential direction; second die rolls ha...

This hot dip galvanized steel sheet comprises a steel sheet and a deposit layer formed on the surface of the steel sheet wherein the steel sheet has a microstructure that contains 20 99 vol.% martensite and/or bainite with the remaining structure comprising ferrite and below 8 vol.% retained austenite and/or up to 1...

This nitrided steel component has excellent bending straightenability and bending fatigue characteristics and is capable of answering the need for components that are smaller and lighter or that have a higher load capacity and is characterized in that the steel material comprises in mass% C: 0.2 0.6% Si: 0.05 1.5% M...

This galvanized steel sheet is provided with a steel plate and a plating layer on the surface of the steel plate. The steel plate has a steel chemical composition including in mass% C:0.05 0.40% Si:0.5 3.0% and Mn:1.5 3.0% has a microstructure containing ferrite bainite a 30% or higher volume fraction of tempered ma...

This cold rolled steel sheet for enameling contains 2><102 to 1×104 per mm2 inclusive of Fe-Mn-Nb complex oxides having a diameter of 0.2-10 µm inclusive and having predetermined chemical components the fatigue limit/tensile strength ratio after a 10% tensile strain is imparted and heat treatment has been carried ou...

This nitrided steel component has excellent pitting resistance and bending fatigue characteristics and is capable of answering the need for components that are smaller and lighter or that have a higher load capacity, and is characterized in that the steel material comprises, in mass%, C: 0.05-0.25%, Si: 0.05-1.5%, M...

This method for producing a die forged crankshaft to be mounted in a reciprocating engine of two or more cylinders includes: an upsetting step in which a billet having a uniform cross sectional area along its entire length is upset thereby molding a buster having an expanded cross sectional area in a section extendi...

Provided is a thick walled steel pipe which is for an oil well and which has a thickness of 40 mm or more an excellent SSC resistance a high strength (827 MPa or more) and a small variation in strength in the thickness direction. Said thick walled steel pipe for an oil well has a chemical composition containing in m...

A hot-rolled steel sheet has an average value of the X-ray random intensity ratlo of a (100) <011> to (223) <110> orientation group at least in a sheet thickness central 5 portion that is in a sheet thickness range of 518 to 318 from a steel sheet surface of 1.0 to 6.0, an X-ray random intensity ratio of a (332) ...

Provided is a brake disc for a railway vehicle the brake disc being configured so that aerodynamic sound during high speed traveling is reduced cooling performance during braking is improved and the durability of the brake disc together with fastening bolts is increased. A brake disc (1) for a railway vehicle is pr...

Provided is a two phase stainless steel which has high strength also has excellent SCC resistance and SSC resistance in a high temperature chloride environment and does not undergo the precipitation of a sigma phase. A two phase stainless steel according to an embodiment of the present invention contains in mass% 0....

A composition for forming a lubricating coating film has a chemical composition comprising: 40 to 80 mass% of a base oil comprising at least one compound selected from a pentaerythritol fatty acid ester and a trimethylolpropane fatty acid ester; 5 to 20 mass% of a drying agent comprising a paraffin wax; and 10 to 40...

A high strength hot dip galvanized steel sheet containing a main component the steel sheet having at least 40 wt% of ferrite as a main phase in terms of the volumetric ratio and 8 60% inclusive of residual austenite the remaining structure comprising one or more of bainite martensite or pearlite. Austenite particles...

Provided is a seamless steel pipe for a line pipe, the seamless steel pipe having a chemical composition which contains, in terms of mass %, 0.03-0.10% of C, ≤ 0.50% of Si, 1.0-2.0% of Mn, ≤ 0.050% of P, ≤ 0.005% of S, 0.05-1.0% of Cr, 0.01-0.30% of Mo, 0.001-0.10% of Al, ≤ 0.01% of N, 0.04-2.0% of Ni, 0.0005-0.0050...

12162This base steel sheet has a hot dip galvanized layer formed on the surface and the volume fraction of a retained austenite phase of the steel sheet structure in a range of 1/8 of the sheet thickness to 3/8 of the sheet thickness centered around 1/4 of the sheet thickness from the surface is not more than 5%...

Provided is a crash box that is more robust than the crash box disclosed in JP 2011 51581A. A crash box (30) comprising a pair of corner parts (32 33) disposed facing each other and another pair of corner parts (34 35) disposed intersecting at an angle of 80 to 100° the crash box comprising a metal pipe (31) having ...

Provided is an alloying molten zinc-plated steel sheet with high strength and excellent deep drawability as well as excellent slab cracking resistance and secondary working embrittlement resistance. The base steel sheet for this alloying molten zinc-plated steel sheet contains, in mass%, C: 0.0080% or less, Si: 0.7%...

A hot dip zinc plating layer or an alloyed hot dip zinc plating layer is formed on the surface of a base steel sheet comprising in terms of volume fractions 40 to 90% of a ferrite phase and not more than 5% of a retained austenite phase and the proportion of non recrystallized ferrite with respect to the total f...

This steel plate has a steel structure obtained by soaking for a soaking time of 15 35 seconds inclusive in the two phase temperature region which is at least the Ac1 temperature and less than the Ac3 temperature then performing primary cooling within three seconds to the temperature region of 250 380°C inclusive at...

Provided is a high strength hot dip galvanized steel sheet and the like said steel sheet providing high ductility while ensuring high strength with a maximum tensile strength of at least 900 MPa and having excellent mechanical cutting characteristics. The high strength hot dip galvanized steel sheet has a thicknes...

A high strength alloyed hot dip galvanized steel sheet obtained by subjecting the surface of a high strength steel sheet to alloyed hot dip galvanization and formed from a steel sheet containing in mass% main components and containing at least 40 vol% bainite and/or martensite 8 60 vol% retained austenite and less t...

132The present invention relates to a steel which contains C Si Mn P S Al N and O each a remainder of which is formed of Fe and inevitable impurities. In a range between a 1/8 thickness around a 1/4 plate thickness from a surface of a base material steel sheet to a 3/8 thickness around the 1/4 plate thicknes...

n electromagnetic steel sheet 0) i s provided with a Jigane (a bodv o f iron blade) ) and an insulating coating film (2) formed on the surface o f the Jigane (1). The insulating coating film (2) comprises: 100 parts b y mass o f a first component ォwhich comprises 100 parts b y mass o f a metal phosphate salt and 1...

By compressing a compression section (B1) at the bottom wall of a cup shaped processed material (B) with an inner punch (11) and an inner die (14) and moving same in the direction away from a middle die (15) while pressing the inner die (14) toward the inner punch (11) and also compressing a compression section (B2)...

[Problem] To provide a rolling device that is able to accurately detect force in the direction of rolling applied to a work roll chock. [Solution] This sheet metal rolling device equipped with a vertical pair of work rolls (1 2) is equipped with: a pair of work roll chocks (5 6) that hold the work rolls (1 2); a hou...

The main purpose of the present invention is to provide a mold flux which is capable of preventing the occurrence of a longitudinal crack in the surface of a cast slab during continuous casting of hypo peritectic steel. The present invention is a mold flux which is used for continuous casting of hypo peritectic ste...

A formation device moves a movable journal mold (11U 11B) toward a fixed journal mold (10U 10B) in the axial direction and moves a pin mold (12) in the same axial direction and in an eccentric direction from a state in which a rough journal section (J ) of a rough material (4) is sandwiched and held between the fixe...

[Problem] To provide a magnetic particle inspection magnetizing device capable of sufficiently ensuring that the density of magnetic flux extending in the circumferential direction of a wheel in the space around both sides of the wheel is adequately provided from a boss to a rim of the wheel. [Solution] The present ...

A hot rolled steel sheet that contains prescribed components that satisfies formula (1) with regard to added amount of Cr and Al and that has a metallographic structure that has a volume fraction of ferrite of more than 90% but 98% or less a volume fraction of martensite of 2% or more but less than 10% and a volume ...

A steel sheet of which the contents which are expressed in mass% of elements in chemical components fulfill both the requirement represented by formula (1) and the requirement represented by formula (2) a Ti containing carbonitride is contained as an intercalated material and the number density of a portion of the T...

A melted and resolidified layer which has a depth of at least 1 mm, and which is obtained by adding, melting, and resolidifying at least one β-phase-stabilizing element is provided to the surface to be rolled of a titanium slab comprising industrial pure titanium produced using an electron beam melting method or a p...

Provided is a welding method for obtaining a lap fillet welded joint which has excellent tensile strength and which is not broken by a weld metal when subjected to a tensile load without increasing the welding deformation. In this method a first steel plate having a tensile strength of 780 MPa or more is overlapped ...

A silicon steel sheet (1) containing Si is coldrolled. Next, a decarburization annealing (3) of the silicon steel sheet (1) is performed so as to cause a primary recrystallization. Next, the silicon steel sheet (1) is coiled so as to obtain a steel sheet coil (31). Next, an annealing (6) of the steel sheet coi...

The purpose of the present invention is to provide: a laser welded joint having exceptional joint strength in which annular welding beads are prevented from cracking during lap laser welding of a steel plate in which the beads are formed in multiple layers said joint comprising welding beads solely in the quantity n...

A full cone spray nozzle is provided with: a nozzle body (1) which has a liquid inlet opening (3) located at the upstream end thereof and also has a spray opening (4) located at the downstream end thereof; and a vane (2) which has an axial length (W) and a diameter (D) and which is disposed at the intermediate posit...

An untempered steel material comprises a steel component comprising in mass% 0.20 to 0.60% of C 0.50 to 2.0% of Si 0.20 to 2.0% of Mn 0.010 to 0.15% of P 0.010 to 0.15% of S 0.10 to 0.50% of V 0.002 to 0.02% of N and a remainder made up by Fe and impurities wherein the segregation ratio of V is 1.0 or more and less ...

An Mg containing Zn alloy coated steel material provided with a steel material and a metal coating layer disposed on a surface of the steel material the metal coating layer being a layered structure of flat metal particles having a particle diameter of 5 100 ??m and a thickness of 0.5 30 ??m the composition of the m...

An alloyed hot dip zinc coated steel sheet comprising a descaled rolled steel sheet and an alloyed hot dip zinc coating layer arranged on the descaled rolled steel sheet wherein the minimum value of the P content in the plating layer is 50% or more of the maximum value of the P content in the plating layer as measur...

This secondary cooling device for a continuous casting machine is provided with a plurality of pairs of support roller and a plurality of nozzles and each support roller has: a plurality of roller sections split in the widthwise direction of a cast strand; and grooves provided between the roller sections. The groove...

This cooling apparatus for a steel material is a cooling apparatus for forming a long steel material (10) into a predetermined shape including a bend by causing one end in a longitudinal direction of the steel material to move in two dimensions or three dimensions, while heating a portion in the longitudinal directi...

The present invention provides a high strength steel sheet having the chemical components recited in the claims. The steel sheet contains composite inclusions that have: a first inclusion phase which includes Ca at least one of Ce La Nd and Pr and at least one of O and S; and a second inclusion phase which has diffe...

A plurality of steel plates including a high tensile strength steel plate are arranged in superposition; pulsed electrical energy is delivered using an inverter DC spot welding power source; the time over which the pulsed current is delivered the electrical energy downtime; i.e. the intervals between the current pul...

The present invention is bearing steel wherein the metal composition comprises as inclusions compound oxysulfides containing rare earth metals Ca, O, S, and Al; TiN; MnS; Al2O3; and compound oxides containing Al and Ca; the number of compound oxysulfide inclusions per the total number of inclusions is 50% or greater...

The cold-bonded carbon composite agglomerates for blast furnaces have a carbon content (T. C) in a range of 18 to 25% by mass, and a porosity in a range of 20 to 30%. The method for manufacturing cold-bonded carbon composite agglomerates for blast furnaces includes: forming a molded body by mixing and kneading iron-...

The cold-bonded carbon composite agglomerates have a carbon content (T. C) in a range of 18 to 25% by mass, and a ratio CaO/SiO2 between a CaO content (% by mass) and a SiO2 content (% by mass) in a range of 1.0 to 2.0. The method for manufacturing cold-bonded carbon composite agglomerates includes: forming a mol...

When an outer punch (23) is lowered while the container bottom section (21a) of a closed bottom cylindrical container (21) is gripped between an inner punch (22) and a die (25) a container opening end (21d) enters the inside of the step shaped groove section (23c) of the outer punch (23) and the container opening en...

A method of production of grain-oriented electrical steel sheet comprising heating a silicon steel material containing, by mass%, Si: 0.8 to 7%, C: 0.085% or less, acid soluble Al: 0.01 to 0.065%, and N: 0.012% or less, and optionally at least one selected from Mn: 1% or less, Cr: 0.3% or less, Cu: 0.4% or less, P: ...

A high strength hot dipped galvanized steel sheet which has a tensile strength of 980 MPa or more while having excellent plating adhesion formability and bore expanding properties. This high strength hot dipped galvanized steel sheet has a hot dipped zinc plating layer on the surface of a matrix steel sheet and the ...

Provided is an anisotropic electromagnetic steel sheet comprising by mass% 0.005% or less of C 0.1% to 2.0% of Si 0.05 to 0.6% of Mn 0.100% or less of P and 0.5% or less of Al wherein the content of nonmagnetic precipitate AlN having an average diameter of 10 to 200 nm is by number density 10 precipitates/µm or less...

Provided is steel for induction hardening that is less likely to develop cracks and has excellent hardness and anti seizing properties even when not tempered after induction hardening. The steel for induction hardening fulfills formula (1) and comprises in percent by mass: 0.20 0.34% C 0.20% or less Si 0.75 2.0% Mn ...

22A coated metal plate for an automobile the plate comprising a metal plate and a coating film (a) on at least one surface of said metal plate wherein: the coating film (a) comprises an organic resin (A) a conductive pigment (B) and an anti rust pigment (C); the minimum Martens hardness at 20°C for the surface of th...

A steel is subjected to [ a step of heating to a temperature higher than point Ac 1 and lower than point Ac 3 and then cooling], [ a step 01 heating again to a temperature equal to or higher than point Ac 3 and then quenching] and [ a step of tempering at a temperature equal to or lower than point Ac 1] in this or...

yy A heat flux derivation unit (202) derives the value q of the y axis component of a heat flux vector. A molten metal surface level derivation unit (203) derives as a molten metal surface level the position of maximum absolute value of the y axis component value q of a heat flux vector the y axis component vector o...

To provide a Ni-based alloy product for a heat and pressure-resistant part and a producing method therefor. [Solution] A Ni-based alloy product consisting of, by mass percent, C: 0.03 to 0.10%, Si: 0.05 to 1.0%, Mn: 0.1 to 1.5%, Sol.Al: 0.0005 to 0.04%, Fe: 20 to 30%, Cr: not less than 21.0% and less than 25.0%, W:...

A seamless austenite heat-resistant alloy tube of the present invention is made with a chemical composition comprising, in terms of mass percent, C : 0.03-0. 15%, Si ≤ 1%, Mn ≤ 2%, P ≤ 0.03%, S ≤ 0.01%, Ni: 35-60%, Cr: 18-38%, W : 3-1 1%, Ti: 0.01-1.2%, Al ≤ 0.5%, B : 0.0001-0.01%, N ≤ 0.02%, and O ≤ 0.008%; at lea...

This method for granulation of sintering raw material includes wet pulverization of iron ore using a vertical pulverizer having a pulverization unit formed from a cylindrical vessel provided with screw blades on a vertical central shaft that is driven rotatably a sorting unit that sorts by the action of gravity and ...

In this method for producing a metal plate with a protruding ridge a metal plate having a plurality of protruding ridges formed along a rolling direction on a top surface is produced using a rolling mill that is provided with a plurality of roll stands. Said production method includes a preparation step a selection ...

[Problem] To provide a carburizing sensing method with which it is possible to sense minute carburizing which cannot be easily sensed with existing carburizing sensing methods. [Solution] The present invention comprises: inserting a carburizing material (PO) which is known to give off carburization in an inner surfa...

A high- strength untempered hot-forged comnonent having a tensile strength of 900 MPa or higher and an endurance ratio i n the perpendicular direction of 0.47 or greater can be obtained by using, as a raw material, a rolled steel bar for hot forging comprising 0.27-0.37% of C , 0.30-0.75% of Si, 1.00-1 .45% of Mn,...

When an area ratio of oxides occupying a steel sheet cross section perpendicular to a rolling direction at a position of a depth t from a surface of a decarburized nitrided steel sheet is set to b (t), an area ratio of Fe-based oxides is set to a (t), and a ratio of the Fe-based oxides to all the oxides at the posit...

A primer-treating agent for a precoated metal sheet, comprising each in terms of a solid content in water: a polyester resin having a particle size of 50 to 150 nm, a glass transition temperature (Tg) of 0 to 30°C and a hydroxyl value of 5 to 13, in addition to tannin or tannic acid, a silane coupling agent and fine...

A heat treated steel product having high strength and excellent chemical conversion processability characterized in that the steel product has been heated to 600 °C or above and bent and has scales with a film thickness of at most 1 µm on the surface wherein the scales contain FeO at a proportion of at least 90%. ...

This steel wire contains in terms of mass% 0.95 1.10% C 0.10 0.70% Si 0.20 1.20% Mn 0.90 1.60% Cr 0 0.25% Mo 0 25 ppm B 0 0.020% P 0 0.020% S 0 0.0010% O 0 0.030% N and 0.010 0.100% Al. In the steel wire the surface layer region has a Vickers hardness of HV300 HV420 an areal pearlite proportion of 80% or greater and...

Provided is a coated metal plate which exhibits excellent conductivity and corrosion resistance, and which can be manufactured at a low cost. The present invention is a conductive and corrosion resistant coated metal plate wherein: a coating film (α) is formed on at least one surface of a metal plate, said coating f...

A laser processing device that includes a laser radiation device , in which said laser radiation device is configured so that the intensity distribution in the cross -section in the direction perpendicular to the scanning direction of a laser beam , which concentrates light on an oriented magnetic steel sheet, on th...

A tubular threaded joint which is free from harmful heavy metals which has excellent galling resistance gas tightness and rust preventing properties and which does not readily undergo yielding of shoulder portions even when subjected to makeup with a high torque is constituted by a pin 1 and a box 2 each having a co...

This chromate free coated metal plate has a coating film (a) containing an organic resin (A) silica particles (C) and polyolefin resin particles (D) on at least one surface of a metal plate. When considering the average particle size of the polyolefin resin particles (D) to be a µm and the thickness of the coating f...

This threaded joint is configured from a pin (10) and a box (20). The outer diameter of the box (20) is less than 104% of the outer diameter of the pipe body of the pin (10). The box (20) is provided with the following in this order from the tip toward the pipe body: a lip section (24) comprising a shoulder surface ...

A resistive spot welding device for performing resistive spot welding on a plate assembly (1) including a plurality of stacked metal plates (2A 2B) the resistive spot welding device being provided with a pair of composite electrodes (10 20) disposed so as to face each other across the plate assembly (1). Each of ...

It is possible to produce a steel part having excellent high-cycle benaing iatigue strength, low-cycle bending fatigue strength, and pitching-resistant strength but controlled fluctuation of heat treatment strain during carburizing and quenching or dur - ing carbonitriding and quenching by subjecting a steel mater...

Provided is a low- alloy steel for oil well pipes , which has an yield stress of 862 MPa (125 ksi) or more and excellent sulfide stress cracking resistance (SSC resistance). The low- alloy steel for oil well pipes according to the present invention has a chemical composition comprising, in mass% , 0.56 to 1.00% of C...

An apparatus for producing alloying galvanized sheet steel comprises: a plating tank that stores a plating bath containing molten zinc and molten Al at a bath temperature (T1) and plates a steel sheet dipped in the plating bath; a separation tank that stores the plating bath transferred from the plating tank at a te...

This laser welded joint is a laser welded joint having welding metals provided between a plurality of steel sheets wherein the welding metals have a chemical composition of predetermined components the average hardness of the welding metals is 350 540 in Vickers hardness the distribution density of porosities having...

A hot dip galvanized steel sheet comprising a base steel sheet and a hot dip galvanizing layer the hot dip galvanized steel sheet having a hot dip galvanizing layer in which columnar crystals comprising 5% or less of Fe 1.0% or less of Al and a ? phase are interposed in 20% or more of the entire interface of the pla...

A rolled steel for cracked connecting rods according to the present embodiment contains in mass percent 0.30 to 0.40% of C 0.60 to 1.00% of Si 0.50 to 1.00% of Mn 0.04 to 0.07% of P 0.04 to 0.13% of S 0.10 to 0.30% of Cr 0.05 to 0.14% of V 0.15% (exclusive) to 0.20% (inclusive) of Ti and 0.002 to 0.020% of N and can...

A crankshaft is provided with a journal section (J) that serves as a central axis of rotation a pin section (P) that is eccentric with respect to the journal section (J) and a crank arm section (A) that connects the journal section (J) and the pin section (P). All or part of the crank arm section (A) integrally co...

This steel plate material (11) is plate shaped and is used in the production of a press molded article having an open cross section containing a bent section. The steel plate material (11) is provided with a band shaped thick region (12) that is singular across all regions and has an increased thickness and thin r...

Provided is a galvanized steel sheet having a tensile strength of 770 MPa or more including a steel sheet portion, and a plated layer formed on the surface of the steel sheet portion, in which the plated layer is a galvanized plated layer or an galvannealed plated layer, the steel sheet portion has a soft layer that...

A welding material for Ni based heat resistant alloys which has a chemical composition containing 0.06 0.18% of C 0.5% or less of Si 1.5% or less of Mn 45 55% of Ni 25 35% of Cr 7.0 13.0% of W more than 0.2% but 1.5% or less of Ti less than 0.1% of Al 0.002 0.20% of N and if necessary 1.0% or less of Nb with the bal...

A laser welded joint exhibiting improved shear joint strength without entailing an increase in welding time or the use of a high value remote laser head the laser welded joint being obtained by subjecting metal plates positioned in an overlapping manner to laser welding from the overlapping direction and being chara...

An alloyed hot- dip galvanized steel sheet in which a parent steel sheet containing a prescribed amount of C , Si, Mn , etc. is used , wherein an alloyed hot -dip galvanized zinc plated layer measuring 3 to 30 µm in thickness and containing 5 to 15% of Fe by mass is applied to the surface of the parent steel sheet ,...

A rolled steel bar or rolled wire material for use in a cold forged component and having a prescribed chemical composition wherein Y1 and Y2 represented by Y1=(Mn)×(Cr) and Y2=0.134×(D/25.4 (0.50×v(C)))/(0.50×v(C)) satisfy Y1>Y2 the tensile strength thereof is 750 MPa or less the internal structure thereof is a ferr...

A non-oriented electrical steel sheet contains 2.8 mass% or more and 4.0 mass% or less of Si, 0.2 mass% or more and 3.0 mass% or less of Al, and 0.02 mass% or more and 0.2 mass% or less of P. The non-oriented electrical steel sheet contains further contains 0.5 mass% ...

A hot-rolled steel sheet for nitriding or a cold-rolled steel sheet for nitriding excellent in fatigue strength contains a steel particularly containing appropriate amounts of Cr, V, and B, in which a dislocation density within 50 µm in the sheet thickness direction from the surface is not less than 2.0 times no...

Provided is a method for production control of steel tubes which are produced by a plurality of manufacturing steps comprising: a step of machining into a tube end part a matrix code into which tube information is encoded with a laser beam such that the width thereof has an angle of arc of 30° or less; and a step of...

This high-strength steel sheet includes by mass percentage: 0.05 to 0.4% of C; 0.1 to 2.5% of Si; 1.0 to 3.5% of Mn; 0.001 to 0.03% of P; 0.0001 to 0.01% of S; 0.001 5 to 2.5% of Al; 0.0001 to 0.01% of N; 0.0001 to 0.008% of O; and a remainder composed of iron and inevitable impurities, wherein a steel sheet stru...

The present invention addresses the problem oi providing a titanium material having hign strength and superior workability. To solve this problem, the present invention provides a titanium material having an iron content of 0.60% by mass or less and an oxygen content of 0 . 15% by mass or less with the remainder b...

An analysis device (1): generates on the basis of finite element model data material physical property data and stress distribution data first displacement distribution data which denotes a displacement distribution of a member arising from spring back; generates on the basis of the finite element model data and the...

The purpose of the present invention is to provide a coupler with achieves high rigidity without increased thickness. This coupler is provided with: a base section (12); a pair of side sections (14 and 14) that continue from the end portions of the base section (12) in a first direction (D1) and extend to the same s...

Provided are an arc spot welding method capable of producing a predetermined weld bead diameter and reinforcement height in rear surface weld beads during arc spot welding and obtaining weld joints having excellent tensile strength in terms of both TSS and CTS and a welding device for performing the method. In the m...

A non-heat treated steel for nitrocarburizing, having a chemical composition consisting of, by mass percent, C: 0.25 to under 0.35%, Si: 0.15-0.35%, Mn: 0.85-1.20%, S < 0.10%, Al: over 0.010% to 0.030%, Ti: 0.003 to 0.020%, and N: 0.010- 0.024%, and the balance of Fe and impurities, wherein P and Cr among the imp...

An austenitic stainless steel in which the component composition thereof in terms of mass% is C: 0.05 0.13% Si: 0.10 1.00% Mn: 0.10 3.00% P: 0.040% or less S: 0.020% or less Cr: 17.00 19.00% Ni: 12.00 15.00% Cu: 2.00 4.00% Mo: 0.01 2.00% W: 2.00 5.00% 2Mo + W: 2.50 5.00% V: 0.01 0.40% Ti: 0.05 0.50% Nb: 0.15 0.70% A...

Provided i s a steel component for mecnanical structural use having increased iatigue resistance and toughness without any reduction in machinability; also provided i s a manufacturing method for the same. A steel component: i s formed ：from steel which includes, i n mass%, 0.05-0.20% C , 0.10-1.00% Si, 0.75-3.00%...

A cooling apparatus of thick-gauge steel plate having a plurality of pairs of constraining rolls, each comprising a top roll and bottom roll, constraining and conveying hot rolled thick-gauge steel plate and a plurality of spray nozzles spraying water on the top and bottom surfaces of the thick-gauge steel plate con...

A press molded article of the present invention has a top plate vertical walls and ridges between the vertical walls and the top plate wherein a shape changing part exists in a portion of the ridges. A press molded article manufacturing method of the present invention comprises: a preparation step in which a metalli...

Disclosed is a precoated metal sheet and a method for manufacturing the same. The precoated metal sheet imparts both appearance of solidity and appearance of depth and has excellent aesthetic properties which include a superior sheen, appearance of solidity and appearance of depth. The sheet is provided with a coati...

A box protector 21 for protecting the inner surface of a box 11 of a threaded joint for pipes having a female threaded portion and a shoulder surface 14 with the shoulder surface being sloped by an angle ? with respect to the direction perpendicular to the pipe axis has a male threaded portion 22 which threadingly e...

Regarding contents of C, Si, Mn and Cr, a value of parameter P represented by the following (equation 1) is 1000 or more. A metallic structure contains wire-drawn pearlite in an area ratio of 98% or more, a diameter is 0.05 mm to 0.18 mm, a tensile strength is 4000 MPa or more, and a twist number in a twist test in...

This ferritic heat resistant steel comprises: a substrate comprising in terms of mass% 0.01 0.3% C 0.01 2% Si 0.01 2% Mn 0.10% or less P 0.03% or less S 7.5 14.0% Cr 0.3% or less sol. Al and 0.005 0.15% N with the remainder being Fe and impurities; and an oxide film which is formed on the substrate and which compris...

The purpose of the present invention is to provide a T joint structure ensuring a sufficient region for attaching another member and ensuring rigidity of a joint portion. The T joint structure is provided with a first member and a second member linked with the first member and extending in a direction perpendicular ...

A fuel tank for a vehicle is configured from a tank body in which an upper tank and a lower tank (120) are joined to each other to form a closed space in which fuel is housed and an auxiliary tank (130) which is affixed to a bottom surface part of the lower tank (120) by spot welding (150) a plurality of rows of spo...

A method for manufacturing a forged crankshaft includes a die forging step for obtaining forged material formed into the shape of a crankshaft by die forging and a reduction step for reducing forged material (30) by a pair of first molds (10). The forged material (30) has first excess parts (Aca Ada) protruding from...

Provided is a low alloy steel for an oil well tubular whereby high strength and excellent SSC resistance are stably obtained. The chemical composition of the low alloy steel for an oil well tubular according to the present invention contains in terms of mass% more than 0.45% and 0.65% or less of C 0.05 0.50% of Si 0...

This high strength cold rolled steel sheet has: a composition which contains in mass% 0.075 to 0.300% of C 0.30 to 2.50% of Si 1.30 to 3.50% of Mn 0.001 to 0.050% of P 0.0001 to 0.0100% of S 0.001 to 1.500% of Al and 0.0001 to 0.0100% of N; a surface microstructure which comprises in volume fraction 3 to 10...

The bosh zone structure of a blast furnace is a structure of a tubular bosh zone that is provided between a tuyere portion and a furnace trunk portion of the blast furnace, and has a diameter expanding upward along a vertical direction, in which the bosh zone has a ring-shaped sheet iron shell, a copper or copper-a...

The present invention produces a hot formed steel sheet member which has the following: a chemical composition that contains in terms of mass% 0.100% 0.340% of C 0.50% 2.00% of Si 1.00% 3.00% of Mn 0.050% or less of P 0.0100% or less of S 0.001% 1.000% of sol. Al and 0.0100% or less of N with the remainder c...

This hot stamp molded article is characterized in that when the carbon content (mass%) silicon content (mass%) and manganese content (mass%) are expressed as [C] [Si] and [Mn] respectively a relationship of (5 × [Si] + [Mn])/[C] > 10 holds and if the metal structure contains martensite at 80% or more by area ratio a...

Provided i s a steel material serving as a material for a shock-absorbent member having high impact energy absorption and reduced fracture under impact load, having the chemical composition, expressed in percentage by mass, of C : 0.05-0. 18%, Mn:1-3%, Si+Al: at least 0.5% but less than 2.5%, and N : 0.001-0.015%, a...

A galvannealed steel sheet includes: a steel sheet; a galvannealed layer which is formed on at least one surface of the steel sheet and includes an amount equal to or more than 0.05 mass% and equal to or less than 0.5 mass% of Al, an amount equal to or more than 6 mass% and equal to or less than 12 mass% of Fe, and ...

A power source device for supplying output current to an electroconduction processing device for the electroconduction processing of a workpiece wherein the power source device is provided with: a first power source; a magnetic energy regeneration switch for receiving the electric current supplied from the first pow...

The present invention provides a method for manufacturing a hot stamped body having a vertical wall said method comprising: a hot rolling process; a winding process; a cold rolling process; a continuous annealing process; and a hot stamping process. The continuous annealing process comprises: a heating process for h...

A hot rolled steel sheet has a specified chemical composition and has a microstructure represented by in vol% 2 to 30% of retained austenite 20 to 85% of ferrite 10 to 60% of bainite 5% or less of pearlite and 10% or less of martensite wherein when an area which is surrounded by a grain boundary having a degree of m...

A hot dip plated high strength steel sheet for press working that comprises: a cold rolled steel sheet which contains in term of mass% 0.0005 0.0050% C up to 0.30% Si 0.70 3.00% Mn up to 0.05% P 0.01 0.05% Ti 0.01 0.04% Nb 0.0005 0.0030% B up to 0.01% S 0.01 0.30% Al and 0.0005 0.010% N with the remainder comprising...

This method for producing a machine part has: a first step in which by performing bending processing on an end portion of a material a processed portion which has a structure in which a plurality of layers having a thickness corresponding to the plate thickness of the material overlap is formed in the material such ...

NA

A low alloy steel containing in mass% 0.01 to 0.15% C 3% or less Si 3% or less Mn 0.005 to 0.050% B and 0.08% or less Al the remainder being Fe and impurities wherein the impurities contain 0.01% or less N 0.05% or less P 0.03% or less S and 0.03% or less O. Said low alloy steel exhibits excellent resistance to embr...

Disclosed is an aqueous solution for absorbing and recovering carbon dioxide from a gas that contains the carbon dioxide said aqueous solution containing an amino alcohol compound represented by general formula [1] and an amine compound represented by general formula [2]. (In general formula [1] R represents an alk...

The present invention provides a steel sheet which has a chemical composition that comprises in mass% 0.18% 0.35% of C 1.0% 3.0% of Mn 0.01% 1.0% of Si 0.001% 0.02% of P 0.0005% 0.01% of S 0.001% 0.01% of N 0.01% 1.0% of Al 0.005% 0.2% of Ti 0.0002% 0.005% of B 0.002% 2.0% of Cr and a remainder made up by iron and u...

This process for producing granules of an iron ore raw material involves a step of adding 0.01 10 parts by mass of a polymeric surfactant having both a hydrophobic group and an acidic functional group and having a molecular weight of 10000 30000 CaO and/or Ca(OH) in the total amount of 0.5 parts by mass or more in t...

A production method for forged crank shafts that includes a die forging step a burr removal step and an excess thickness section bending step. In the die forging step a finished forged material having burrs thereon and having a crankshaft shape molded therein is molded said crank shaft shape having excess thickn...

The present invention provides a process for producing a hot stamp molded article which comprises a hot rolling step a winding step a cold rolling step a continuous annealing step and a hot stamping step wherein the continuous annealing step comprises a heating step of heating a cold rolled steel sheet to a temperat...

A manufacturing method of a reduced iron includes: a kneading process of adding a fluid at 60°C or higher and 90°C or lower to a mixture of an iron oxide material and a reducing agent, both of which are in a powder form, and kneading the mixture; a pelletization process of agglomerating the mixture after the knea...

When the carbon content silicon content and manganese content of this cold rolled sheet are expressed as [C] [Si] and [Mn] respectively in terms of unit mass% a relationship of (5 × [Si] + [Mn])/[C] > 10 holds and the metal structure contains ferrite at 40% to 90% and martensite at 10% to 60% by area ratio an...

This non oriented electromagnetic steel sheet contains in mass% C: 0% 0.0050% Si: 0.50% 2.70% Mn: 0.10% 3.00% Al: 1.00% 2.70% and P: 0.050% 0.100%. Al/(Si + Al + 0.5 × Mn) is equal to 0.50 0.83 Si + Al/2 + Mn/4 + 5 × P is equal to 1.28 3.90 Si + Al + 0.5 × Mn is equal to 4.0 7.0 the ratio of the intensity I{100} of ...

Provided is stainless steel for oil wells which has excellent corrosion resistance at high temperatures and is capable of stably achieving a strength of 758 MPa or more. This stainless steel for oil wells contains in mass% 0.05% or less of C less than 1.0% of Si 0.01 1.0% of Mn 0.05% or less of P 0.002% or less of S...

A press molding device (20) for producing a press molded article (10) having a hat shaped cross section and having an external shape curved in an L shape along the longitudinal direction in the planar view. The press molding device (20) comprises: a punch (31); a first blank holder (32); a second blank holder (33); ...

A misalignment calculation system provided with a misalignment calculation device for calculating the amount of misalignment when performing a butt weld of the end of a first steel pipe and the end of a second steel pipe using profile data measured in the circumferential direction given a preset first angle referen...

A method for manufacturing a wide mouthed metal pipe from a hollow element tube having along the circumferential direction multiple regions with different deformation resistance said manufacturing method having: a first step wherein a region for which the deformation resistance is relatively small is identified as a...

When the carbon content silicon content and manganese content of this hot stamp molded article are expressed as [C] [Si] and [Mn] respectively in terms of unit mass% a relationship of (5 × [Si] + [Mn])/[C] > 11 holds; and the metal structure after hot stamping contains ferrite at 40% to 90% and martensite at 10% to ...

When the carbon content silicon content and manganese content of this cold rolled steel sheet are expressed as [C] [Si] and [Mn] respectively in terms of unit mass% a relationship of (5 × [Si] + [Mn])/[C] > 11 holds; and the metal structure after hot stamping contains ferrite at 40% to 90% and martensite at 10% to 6...

Provided is a front floor panel composed of a lightweight metal plate which can be reliably press formed without the load during press formation becoming excessive and the desired rigidity and acoustic vibration characteristics can be achieved in all directions because there is little anisotropy of rigidity. A front...

This hot pressed steel sheet member has a prescribed chemical composition and exhibits a ferrite area ratio in a surface layer section from the surface to a depth of 15µm that is equal to or less than 1.20 times the ferrite area ratio in an inner layer section which is a region other than the surface layer section....

Provided is a lightweight shock absorbing part that more stably deforms in a crushed manner like an accordion even when the direction in which a shock load is incurred intersects the direction of shock absorption. The shock absorbing part according to the present invention is configured of a member molded from a s...

To provide a structural member having excellent load transmission characteristics during impact load in a long metal structural member having a substantially groove shaped cross section. [Solution] A metal structural member formed in a long shape extending in a prescribed direction having: a groove floor section; tw...

Disclosed is a method of cutting steel for use in machine structures wherein the steel for use in machine structures has a chemical constitution which includes in mass% C:0.01 1.2% Si:0.005 3.0% Mn:0.05% 3.0% P:0.001 0.2% S:0.001 0.35% N:0.002 0.035% and Al:0.05 1.0% which fulfills [Al%] (27/14)×[N%]?0.05% (where [A...

The present invention has as its object the provision of a non-quenched and tempered steel for hot 5 forging use which enables induction hardening and a hot forged non-quenched and tempered part and method of production of the same which control the structure inside a part by cooling after hot forging so as to ...

The present invention relates to a hot rolled steel sheet a cold rolled steel sheet and a plated steel sheet which show excellent uniform ductility and local ductility when deformed at a high speed. A two phase hot rolled steel sheet according to one embodiment of the invention has a metallographic structure compris...

This forming device causes a rough journal section (Ja) of a rough element (4) to be held sandwiched by a journal mold (10U , 10B), moves the journal mold (10U , 10B) and a mobile pin mold (12) in the axial direction towards a reference pin mold (11) from the state of the reference pin mold (11) and the mobile pin m...

A method of production of a welded joint which enables improvement of the fatigue strength in the case where measures for improvement of the fatigue strength cannot be applied due to the presence of structurally sealed regions is provided. The method is provided with a first weld step which performs welding by formi...

A threaded joint for pipes comprises a pin 1 and a box 2 each having a contact surface including a threaded portion 3 7 and an unthreaded metal contact portion. The unthreaded metal contact portion includes a sealing surface 5 8 and a shoulder surface 9 10 11 12. The shoulder surface of the pin is located on the end...

This edging method comprises changing the incident angle of a slab with respect to a pair of edging members, which are arranged on a slab conveyance line and which edge the slab, on the basis of information about the slab obtained at least before or after the edging.

A gas wiping device is provided with: a pair of wiping nozzles disposed facing each other so as to sandwich a plated steel plate in the direction of thickness of the plated steel plate and such that each sprays wiping gas along the direction of the width of the plated steel plate; gas shielding plates disposed so as...

A press- forming device (1a) successively carries out: a first step in which a plate- shaped workpiece is pushed into the inside of a die (14) by a punch (11) for formation , and formed into a cup shaped workpiece (B); a second step in which a pressure member (12) is brought into contact with the end part of a cup v...

A steel for a carburizing and a carburized steel component having a steel portion and a carburized layer with a thickness of more than 0.4 mm to less than 2 mm which is 5 formed on an outside of the steel portion. A chemical composition of the steel for the carburizing and the steel portion of the carburized stee...

A hot rolled steel sheet comprises in mass% 0.030 0.120% of C at most 1.20% of Si 1.00 3.00% of Mn 0.01 0.70% of Al 0.05 0.20% of Ti 0.01 0.10% of Nb at most 0.020% of P at most 0.010% of S and at most 0.005% of N with the remainder consisting of Fe and impurities wherein: 0.106=(C% Ti%*12/48 Nb%*12/93)=0.012; the {...

The present invention provides a rolling mill for metal sheet material comprising: a housing that accommodates roll chocks has a pair of first projecting blocks projecting inward toward each other and bearing the force in the direction of rolling that operates on a lower work roll and forms a housing window that bea...

A strain aging hardening type steel sheet excellent in aging resistance, and manufacturing method thereof, said steel sheet comprises : in mass%, C: 0.0010 to 0.010%; Si: 0.005 to 1.0%; Mn: 0.08 to 1.0%; P: 0.003 to 0.10%; S: 0.0005 to 0.020%; Al: 0.010 to 0.10%; Cr: 0.005 to 0.20%; Mo: 0.005 to 0.20%; Ti: 0.002 to ...

This process includes: using a slab having a desired composition which contains 0.02 to 0.20% of Sn and 0.010 to 0.080% of P; adjusting the finishing temperature of hot rolling of the slab to 950°C or lower; annealing the hot rolled steel plate at 800 to 1200°C; adjusting the cooling rate in cooling the hot rolled s...

A lubricating coating which can prevent the occurrence of galling even when makeup is carried out with a high torque and which has excellent rust preventing properties is formed on the contact surfaces of a pin and/or a box of a tubular threaded joint. The lubricating coating contains copolymer particles made from p...

A method for manufacturing a component with a hat shaped cross section said method being equipped with: a sandwiching step wherein a pair of vertical walls in an elongated preliminarily formed component that has been press formed into a hat shaped cross section are arranged on the outside of a punch in the width dir...

This steel sheet contains in mass% from 0.020% to 0.080% (inclusive) of C from 0.01% to 0.10% (inclusive) of Si from 0.80% to 1.80% (inclusive) of Mn and more than 0.10% but less than 0.40% of Al and additionally contains from 0.005% to 0.095% (inclusive) of Nb and from 0.005% to 0.095% (inclusive) of Ti so that the...

This double pipe for a welded structure exhibits excellent weld crack resistance wherein: said double pipe is composed of an inner pipe that is made of a ferrite heat resistant steel having a chemical composition comprising specific amounts of C Si Mn P S Ni+Cu Cr Mo+W V Nb Ti B Al N and O with the balance comprisin...

Disclosed is a torsion beam used in a suspension device for an automobile the suspension device being provided with a pair of arm members which extend in the front rear direction of the automobile the arm members being connected in a pivotable manner to the body of the automobile the arm members allowing wheels to b...

On at least one surface of a base metal plate (1) of an α-γ  transforming Fe or Fe alloy, a metal layer (2) containing ferrite former is formed. Next, the base metal plate (1) and the metal layer (2) are heated to an A3 point of the Fe or the Fe alloy, whereby the ferrite former are diffused into the base metal plat...

The disclosed stave is provided in an inner circumference of each of a bosh section and a belly section of a blast furnace.  The stave includes a copper or copper-alloy stave body which has a reference surface facing an internal space of the blast furnace, and a plurality of protrusions which protrude from the refer...

A hot-rolled steel bar or wire rod consisting of C: 0.1 to 0.3%, Si: 0.05 to 1.5%, Mn: 0.4 to 2.0%, S: 0.003 to 0.05%, Cr: 0.5 to 3.0%, Al: 0.02 to 0.05%, and N: 0.010 to 0.025%, the balance being Fe and impurities, and the impurities containing P: 0.025% or less, Ti: 0.003% or less, and O: 0.002% or less, wherein t...

The present invention provides a bake-hardenable high-strength cold-rolled steel sheet having excellent bake hardenability, cold aging resistance, and deep-drawability, and reduced planar anisotropy, containing chemical components in % by mass of: C: 0.0010% to 0.0040%, Si: 0.005% to 0.05%, Mn: 0.1% to 0.8%, P: 0.01...

A plated steel plate for hot pressing having hot lubricity film adhesion spot weldability and corrosion resistance after coating and a method of hot pressing said steel plate are provided. This plated steel plate for hot pressing and hot pressing method of said plated steel plate are characterized in that an Al plat...

In order to provide a tubular threaded joint constituted by a pin and a box each having threads and an unthreaded metal contact portion with excellent galling resistance and gas tightness even in extremely cold environments at 60° C to 20° C and rust preventing properties without using a compound grease a thermoplas...

This rail has a predetermined chemical composition. At least 90% of the metallographic structure from the outer surface of the rail bottom to a depth of 5 mm is pearlite structure. The surface hardness HC of the foot bottom central section is Hv 360 500 and the surface hardness HE of the foot front section is Hv 260...

2This rail has a predetermined chemical composition and satisfies 1.00

IN THIS RAIL AT LEAST 95% OF THE STRUCTURE OF A HEAD CORNER PART AND A HEAD SURFACE PART WHICH CONSTITUTES A RANGE UP TO A DEPTH OF 20 MM USING THE SURFACE OF A HEAD TOP PART AS A STARTING POINT IS A PEARLITE OR BAINITE STRUCTURE. THE STRUCTURE IN A LATERAL CROSS SECTION OF THE RAIL CONTAINS 20 TO 200 MNS SULFIDES P...

A panel shaped molded article (1) comprising a metal plate comprises a top plate (2) an opening (3) and a vertical wall (4). The top plate (2) is a polygon. The opening (3) is formed in the top plate (2). The vertical wall (4) extends from at least two adjacent sides among the sides of the top plate (2). Each vertic...

The main purpose of the present invention is to provide an electromagnetic stirring apparatus such that uniform electromagnetic force can be supplied to each mold. In an electromagnetic stirring apparatus (5) according to the present invention two teeth portions (12) are disposed on cores (11) of a pair of electroma...

DISCLOSED IS A HIGH-STRENGTH STEEL SHEET WHICH CONTAINS, IN MASS%, 0.01-0.10% OF C, 0.15% OR LESS OF SI, 0.80-1.80% OF MN, 0.10% OR LESS OF P, 0.015% OR LESS OF S, 0.10-0.80% OF AL, 0.01-1.50% OF CR AND 0.0100% OR LESS OF N WITH THE BALANCE MADE UP OF IRON AND UNAVOIDABLE IMPURITIES. THE METALLIC STRUCTURE THEREOF I...

A ball bearing is provided which, during high loads, does not have sites where the surface pressure on a holding body becomes locally high, thereby suppressing cracking and thus increasing service life. This ball bearing is provided with a pair of holding bodies (12, 14) and with at least one rolling body (16) movab...

Disclosed is a method for manufacturing an L shaped product (10) the L shaped product (10) including an L shaped flat upper wall (12) an inner sidewall (14) extended along and coupled to an inner edge portion (12c) of the upper wall and an outer sidewall (16) extended along and coupled to an outer edge portion (12d)...

The present invention provides a colored and coated chromate free metal sheet which has formed on at least one surface of a metal sheet a colored coating film (a) that comprises a film forming component comprising a polyurethane resin (A1) containing a urea group a urethane group and a carboxyl group a coloring pigm...

The method for manufacturing a press-molded article according to the present invention, the press-molded article being provided with a pair of flat sections and a bend section connecting the flat sections, the bend radius of the bend section being R2 (mm) and the interior angle formed by the pair of flat sections be...

This front pillar lower outer (10) is provided with a curved site (13) a first site (14) and a second site (15) and it is envisioned that an impact load would be incurred along the direction of extension of the first site (14). The outer (10) is configured from joining a first member (11) disposed at the first si...

A bumper beam (1) is provided with a first member (2) a second member (3) and an inner plate (4). The first member (2) includes a top plate (5) two vertical walls (6) and two flanges (7a 7b). The two vertical walls (6) connect to both side sections (5a 5b) respectively of the top plate (5). The two flanges (7a 7b) c...

This cutting and machining device cuts off an end section (3) of a plate material (1) and obtains a material to be machined by using a first cutting blade (101) and a second cutting blade (102) that relatively approach each other and comprises: a first contact section (104) and the first cutting blade (101) that san...

An austenitic heat resistant alloy consisting of, by mass percent, C: 0.15% or less, Si: 2% or less, Mn: 3% or less, Ni: 40 to 60%, Co: 0.03 to 25%, Cr: 15% or more and less than 28%, either one or both of Mo: 12% or less and W: less than 4%, the total content thereof being 0.1 to 12%, Nd: 0.001 to 0.1%, B: 0.0005 t...

Problem] To enhance load resistance performance with respect to collision. [Solution] The end structure for a vehicle pertaining to the present invention is provided with a beam extending in the vehicle width direction and a connecting structure 3 for connecting the beam 2 to a vehicle body frame, the beam 2 having,...

[Problem] To more easily provide a galvanized steel sheet that exhibits excellent coating film adhesion after hot pressing. [Solution] A galvanized steel sheet according to the present invention is provided with: a galvanized steel sheet that serves as the base; and a surface treatment layer that is formed on at le...

A steel plate for use in a fuel tank and equipped with a Zn Ni alloy plating layer positioned on one or both surfaces of a ferrite and a chromate free conversion coating positioned on top of the Zn Ni alloy plating layer wherein the Zn Ni alloy plating layer has cracks extending from the interface with the chromate ...

Provided are a connected wall structure consisting of steel pipe sheet piles and a steel sheet pile and a method of constructing the same, such that there is formed a connected structure wherein a certain degree of construction errors is made allowable, with the result that there is provided a rational connected str...

To provide a hot-rolled steel sheet that is superior in a chemical conversion processability, a fatigue property and a hole 5 . expandability, and that has a tensile strength of 780 MPa or more. [Means for Solving the Problem] A hot-rolled steel sheet includes a maximum concentration of Al as an oxide detected b...

Using data from thermocouples (6) the heat transfer coefficient a between a solidifying shell (2) and a mold (4) which sandwich a mold flux layer (3) and the heat transfer coefficient ß between molten steel (1) and the solidifying shell (2) are found by solving inverse problems and the solidifying shell thickness...

This slag supply container for an electric furnace for steel slag reduction is provided with: a container body that causes hot steel slag to flow toward the electric furnace; a slag discharging part connected to an electric furnace side slag supply opening; a slag receptacle that receives a supply of the hot steel s...

This steel slag reduction equipment continuously reduces hot steel slag using an electric furnace and is provided with: a slag supply container inside the electric furnace into which hot steel slag flows; an electrode that is provided to the electric furnace and heats a molten slag layer on molten iron generated by ...

This forged steel roll manufacturing method involves casting with the ESR method steel ingots which contain (in a mass%) C:0.3% or more Si:0.2% or more Cr:2.0 13.0% and Mo:0.2% or more and further contain Bi at 10 100 ppm by mass and forging the steel ingots and manufacturing rolls. By this means because freckle def...