A high-strength steel sheet according to the present invention comprises, by weight percent, 10.0-15.0 % of Mn, 6.0-9.0% of Al, 0.5-2.0% of Cr, 0.8-1.6% of C, 0.001-0.01% of N, and further comprises 0.02-0.1% of V, 0.005-0.015% of Nb, and 0.005-0.02% of Mo, or 0.1-0.5% of TiAl particles. The high-strength steel shee...

This invention relates to a quenchable steel sheet having hot press workability and a method of manufacturing the same. The quenchable steel sheet has an alloy composition including carbon (C) in an amount of 0.15 ~ 0.30 wt%, silicon (Si) in an amount of 0.05 ~ 0.5 wt%, manganese (Mn) in an amount of 1.0 ~ 2.0 wt%, ...

Disclosed are pulverized coal for pig iron making comprising cow manure and a pig iron production method using same. The present invention has the advantage of making it possible to improve the combustion properties of pulverized coal and to increase efficiency and safety in blast furnace operation. ...

A method for mixing iron and steel raw material includes a process of stacking a raw material that forming a raw material pile by sequentially stacking a first raw material mixture block and a second raw material mixture block formed by discharging raw materials from a plurality of bins and mixing the raw materials ...

Disclosed is a stacker and reclaimer for iron and steel raw material comprising: a rotary shaft 20, disposed at the center in a circular dome 10, having a space for stacking iron and steel raw materials; an inputting unit 30, disposed over the rotary shaft, for putting the iron and steel raw materials to the upper p...

A wall (20) is disposed at the center portion in the linear house (10), a plurality of partitions (22) are disposed at both sides of the wall (20) to form a plurality of stacking spaces in the longitudinal direction of the wall, stacking units (30) that stack iron and steel raw materials carried by a tripper car to ...

Disclosed is a method for manufacturing a plated steel plate. The method for manufacturing a plated steel plate according to the present invention comprises: a step for reheating a steel slab containing 0.15 to 0.25 wt% of carbon (C) more than 0 wt% to 1.5 wt% or less of silicon (Si) 1.5 to 2.5 wt% of manganese (Mn)...

Disclosed is an invention relating to a method for producing a molded article. The method for producing the molded article 5 includes the steps of: preparing a first steel plate and a second steel plate; joining the first steel plate and the second steel plate to each other, thereby preparing a joined steel plate; h...

Disclosed are a steel sheet having excellent and a method for producing the same. The disclosed steel sheet comprises, by weight, 0.005-0.06% carbon (C), 0.2% or less silicon (Si), 1.0-2.0% manganese (Mn), 0.01% or less sulfur (S), 0.2-2.0% aluminum (Al), one or more of chromium (Cr) and molybdenum (Mo) in an amount...

Disclosed are a steel sheet having excellent aging resistance and low yield ratio properties and a method for producing same. The steel sheet according to the present invention is characterized by: consisting of in wt% C: 0.005 0.06% Si: 0.2% or less Mn: 1.0 2.0% P: 0.08% or less S: 0.01% or less Al: 0.2 2.0% at lea...

According to the present invention provided is a method for controlling surface quality of a ultra low carbon steel slab the method comprising the steps of: measuring the phosphorus (P) content the sulfur (S) content and the degree of superheating of molten steel input in a mold at the time of continuous casting for...

A high-strength steel sheet according to the present invention comprises, by weight percent, 10.0-15.0 % of Mn, 6.0-9.0% of Al, 0.5-2.0% of Cr, 0.8-1.6% of C, 0.001-0.01% of N, and further comprises 0.02-0.1% of V, 0.005-0.015% of Nb, and 0.005-0.02% of Mo, or 0.1-0.5% of TiAl particles. The high-strength steel shee...

Disclosed are a high-strength hot-rolled plated steel sheet capable of suppressing the occurrence of material deterioration at the time of plating while having high strength, and a method for manufacturing the same. The high-strength hot-rolled plated steel sheet according to the present invention comprises: a hot-r...

A steel sheet having high strength and high formability according to an aspect of the present invention comprises, by wt%, 0.05-0.15% of carbon (C), greater than 0 and 0.4% or less of silicon (Si), 4.0-9.0% of manganese (Mn), greater than 0 and 0.3% or less of aluminum (Al), 0.02% or less of phosphorus (P), 0.005% o...

Disclosed are a hot-dip galvannealed steel sheet with ultra-high strength and high formability, and a manufacturing method therefor. In one specific embodiment, a hot-dip galvannealed steel sheet comprises: a base steel sheet; and a hot-dip galvannealed layer formed on the surface of the base steel sheet, wherein: t...

A steel sheet having high strength and high formability according to an aspect of the present invention comprises, in wt%: 0.12-0.22% of carbon (C); 1.6-2.4% of silicon (Si); 2.0-3.0% of manganese (Mn); 0.01-0.05% of aluminum (Al); greater than 0 and less than or equal to 0.05% of the sum of one or more of titanium,...

The present invention provides an ultra high strength cold rolled steel sheet having excellent spot weldability and formability. The ultra high strength cold rolled steel sheet, according to one embodiment of the present invention, comprises, in weight percent,: 0.05% to 0.09% of carbon (C); 0.5% to 1.0% of silicon ...

The present invention provides a dent-resistant cold-rolled steel sheet having excellent dent-resistance properties. According to one embodiment of the present invention, the dent-resistant cold-rolled steel sheet comprises, by weight, carbon (C): 0.005% to 0.03%, manganese (Mn): 1.0% to 2.5%, aluminum (Al): 0.2% to...

A cold rolled steel sheet with ultra-high strength, and a manufacturing method therefor are disclosed. According to one specific embodiment, a cold rolled steel sheet with ultra-high strength comprises 0.10-0.40 wt% of carbon (C), 0.10-0.80 wt% of silicon (Si), 0.6-1.4 wt% of manganese (Mn), 0.01-0.30 wt% of aluminu...

An embodiment of the present invention discloses a method for manufacturing a hot-stamped component, the method comprising: a step for injecting a blank into a heating furnace provided with a plurality of compartments having different temperature ranges; a multi-stage heating step for heating the blank in stages; an...

Disclosed are: an aluminum-based plated blank; a method for manufacturing same; and an apparatus for manufacturing an aluminum-based plated blank. In a specific embodiment, the aluminum-based plated blank includes a joint connecting at least two aluminum-based plated steel sheets including: a base steel sheet contai...

Disclosed is an aluminum-coated blank, one embodiment of the present invention comprising: a first coated steel plate; a second coated steel plate connected to the first coated steel plate; and a connection part connecting the first and second coated steel plates at the respective boundaries.

An embodiment of the present invention is a steel sheet for hot pressing comprising: a base steel sheet; and a plating layer positioned on the base steel sheet and having a diffusion layer and a surface layer which are sequentially stacked, wherein the diffusion layer comprises an Fe-Al alloy layer and an Fe-Al inte...

Disclosed in one embodiment of the present invention is a hot stamped part comprising: a base steel sheet; and a plated layer positioned on top of the base steel sheet and including a first layer and a second layer, sequentially stacked on one another, wherein the plated layer further comprises an intermetallic comp...

Disclosed is a method for producing a hot stamping blank comprising the steps of: forming a plated layer on a steel plate by submerging same in a plating bath containing aluminum and silicon; and heating the steel plate, on which the plated layer has been formed, for a first duration of time at a first temperature. ...

The present invention provides a material, for hot stamping, which can acquire excellent mechanical properties and hydrogen delayed fracture characteristic for a hot stamping component, and a preparation method thereof, the material for hot stamping comprising: a steel sheet comprising 0.19-0.25 wt % of carbon (C), ...

The present invention provides a hot stamping material and a production method therefor, whereby excellent mechanical properties and hydrogen delayed fracture properties of a hot-stamped component may be secured, the hot stamping material trapping hydrogen and comprising: a steel sheet comprising 0.28-0.50 wt% of ca...

Disclosed in an embodiment of the present invention is a steel sheet for hot pressing comprising 0.03-0.15 wt% of carbon (C), 0.1-1.5 wt% of silicon (Si), 1.0-2.0 wt% of manganese (Mn), 0.1 wt% or less of phosphorus (P), 0.01 wt% or less of sulfur (S), 0.0005-0.005 wt% of boron (B), a combined amount of at least one...

A hot-stamped component according to an embodiment of the present invention comprises: a steel sheet; a plating layer located on the steel sheet and containing Zn; and a surface layer located on the plating layer, wherein the surface layer comprises: a post-treatment layer containing a Si-based inorganic post-treatm...

Disclosed in one embodiment of the present invention is an aluminum-coated blank comprising: a first coated steel sheet; a second coated steel sheet connected to the first coated steel sheet; and a connection part for connecting the first and second coated steel sheets at respective boundaries thereof. ...

A hot stamping component according to one embodiment of the present invention comprises: a steel sheet; a plating layer positioned on the steel sheet and comprising Zn; and a surface layer positioned on the plating layer, wherein the surface layer comprises: a post-treatment layer comprising a Si-based inorganic pos...

A method for manufacturing a plated steel having excellent processability and corrosion resistance according to one embodiment of the present invention comprises: a step for immersing an iron substrate in a molten alloy plating bath; and a step for forming a molten alloy plating layer on the iron substrate by withdr...

The present invention provides a plated steel material having excellent processability and corrosion resistance, the plated steel material comprising: a base iron; and a hot-dip alloy-plated layer formed on the base iron, the hot-dip alloy-plated layer comprising, in wt%, 5-30% of Al, 2-10% of Mg, and a balance of Z...

A method for manufacturing a hot-stamped component, according to one embodiment of the present invention, comprises: a step of inserting a blank having a plating layer formed on at least one surface of a base material into a heating furnace having a plurality of sections having different temperature increase rate ra...

In an embodiment of the present invention, disclosed is a member for an automobile structure including a base steel plate and a plating layer covering at least one surface of the base steel plate, the member having the tensile strength of 1350 MPa or more and the yield strength of 900 MPa or more, wherein the base s...

According to an aspect of the present invention, provided is a method for manufacturing a hot-stamped component of which the residual stress analysis value satisfies a preset condition, the method comprising the steps of: heating a blank; hot-stamping the blank to form a molded body; and cooling the molded body to f...

The present invention provides a hot-stamped part comprising a base steel containing carbon (C): 0.19-0.25 wt%, silicon (Si): 0.1-0.6 wt%, manganese (Mn): 0.8-1.6 wt%, phosphorus (P): 0.03 wt% or less, sulfur (S): 0.015 wt% or less, chromium (Cr): 0.1-0.6 wt%, boron (B): 0.001-0.005 wt%, an additive: 0.1 wt% or less...

Provided is a snout control system comprising: a snout apparatus in which one end of a steel sheet is immersed in a plating bath, containing a hot-dip galvanizing solution for plating the steel sheet, to introduce the steel sheet into the plating bath during the production process of a hot-dip galvanized steel sheet...

A method for manufacturing a non-oriented electrical steel sheet, according to an embodiment of the present invention, comprises the steps of: first hot-rolling of each of a first steel material and a second steel material which contain silicon (Si), manganese (Mn), and aluminum (Al); forming a first laminated struc...

The present invention relates to a fuel cell bipolar plate having corrosion resistance and high conductivity, and a fuel cell bipolar plate coating method, and provides a fuel cell bipolar plate comprising: a metal substrate; and a coating layer which is formed on the metal substrate, and which is composed of a mixt...

The present invention relates to a method and a device for molding a sheet material into a hat type which protrudes a predetermined height from a floor surface and which has a flat surface on the top thereof, and the method may comprise the steps of: (S1) molding a sheet material into the shape a protrusion having a...

A method for manufacturing a non-oriented electrical steel sheet according to one embodiment of the present invention comprises the steps of: providing a steel material containing silicon (Si), manganese (Mn), and aluminum (Al); hot-rolling the steel material; performing a first heat treatment before winding the hot...

A non-oriented electrical steel sheet according to an embodiment of the present invention is a non-oriented electrical steel sheet comprising: more than 0 and equal to or less than 0.003 wt% of carbon (C); 2.0-4.0 wt% of silicon (Si); 0.1-0.5 wt% of manganese (Mn); 0.3-0.9 wt% of aluminum (Al); more than 0 and equal...

The present invention provides a non-oriented electric steel sheet comprising 2.8 to 3.8 wt% of silicon (Si), 0.2 to 0.5 wt% of manganese (Mn), 0.5 to 1.2 wt% of aluminum (Al), 0 (exclusive) to 0.002 wt% of carbon (C), 0 (exclusive) to 0.015 wt% of phosphorus (P), 0 (exclusive) to 0.002 wt% of sulfur (S), 0 (exclusi...

The present invention provides a non-oriented electrical steel sheet comprising: 2.8-3.8 wt% of silicon (Si); 0.2-0.5 wt% of manganese (Mn); 0.5-1.5 wt% of aluminum (Al); 0 to 0.003 wt% (exclusive of 0) of carbon (C); 0 to 0.015 wt% (exclusive of 0) of phosphorus (P); 0 to 0.003 wt% (exclusive of 0) of sulfur (S); 0...

A method for manufacturing a metal separator for a vehicle fuel cell according to an aspect of the present invention comprises the steps of: preparing a matrix; applying a platinum (Pt)-containing coating agent and an electrolyte to the matrix to form a discontinuous coating film; and thermally treating the coating ...

The present invention provides a hot stamping part having a tensile strength of 1350 Mpa or more, wherein the hot stamping part has a microstructure including a prior austenite grain (PAG), and the average grain size of the prior austenite grain is 35? or less.

The present invention provides a manufacturing method for hot-stamped parts, comprising the steps of: feeding a blank into a heating furnace; heating the blank; and transferring the heated blank from the heating furnace to a mold, wherein a time during which the blank is air-cooled in the step of transferring the bl...

The present invention provides a hot stamping part having a tensile strength of 1650 Mpa or higher, wherein the hot stamping part has a microstructure including prior austenite grains (PAG), and the prior austenite grains have an average grain size of 25? or less.

The present invention provides a hot stamping component comprising a base steel plate containing 0.28-0.50 wt% of carbon (C), 0.15-0.7 wt% of silicon (Si), 0.5-2.0 wt% of manganese (Mn), 0.03 wt% or less of phosphorus (P), 0.01 wt% or less of sulfur (S), 0.1-0.6 wt% of chromium (Cr), 0.001-0.005 wt% of boron (B), an...

A material for hot stamping according to an embodiment of the present invention comprises: a steel sheet comprising 0.28 to 0.50 wt% of carbon (C), 0.15 to 0.70 wt% of silicon (Si), 0.5 to 2.0 wt% of manganese (Mn), 0.05 wt% or less of phosphorus (P), 0.01 wt% or less of sulfur (S), 0.1 to 0.5 wt% of chromium (Cr), ...

The present invention provides a material for hot stamping which comprises: a steel sheet comprising 0.19 to 0.25 wt% of carbon (C), 0.1 to 0.6 wt% of silicon (Si), 0.8 to 1.6 wt% of manganese (Mn), more than 0 wt% and 0.03 wt% or less of phosphorus (P), more than 0 wt% and 0.015 wt% or less of sulfur (S), 0.1 to 0....

Disclosed is a steel sheet for hot press forming, which includes: a base steel sheet; and a plating layer disposed on the base steel sheet and including a diffusion layer and a surface layer that are sequentially laminated, wherein the diffusion layer includes an Fe-Al alloy layer and an Fe-Al intermetallic compound...

According to one aspect of the present invention, provided is a hot stamping part comprising a steel sheet that includes: 0.26-0.40 wt% of carbon (C); 0.02-2.0 wt% of silicon (Si); 0.3-1.60 wt% of manganese (Mn); at most 0.03 wt% of phosphorus (P); at most 0.008 wt% of sulfur (S); 0.05-0.90 wt% of chromium (Cr); 0.0...

The present invention provides a hot-stamped component comprising a base steel sheet comprising 0.15-0.27 wt% of carbon (C), 0.15-1.0 wt% of silicon (Si), 0.5-1.10 wt% of manganese (Mn), 0.018 wt% or less of phosphorus (P), 0.005 wt% or less of sulfur (S), 0.1-1.0 wt% of chromium (Cr), 0.1-1.0 wt% of aluminum (Al), ...

The present invention provides a method for manufacturing a hot stamping part, the method comprising: a preparation step for preparing a blank; a heating step for heating the blank; a transfer step for transferring the heated blank to a press mold; a molding and first piercing step for molding at least two holes in ...

Disclosed is an invention concerning a method for manufacturing non-oriented electrical steel sheets with excellent magnetic properties and the non-oriented electrical steel sheets produced thereby. In a specific embodiment, the method for manufacturing non-oriented electrical steel sheets with excellent magnetic pr...

The present invention provides a method for manufacturing a non oriented electrical steel sheet comprising the steps of: preparing a slab comprising by wt% carbon (C) in an amount greater than 0% and less than or equal to 0.002% 2.3 2.8% of silicon (Si) 0.2 0.28% of manganese (Mn) 0.32 0.45% of aluminum (Al) ...

The present invention provides a method for manufacturing a non oriented electrical steel sheet the method comprising the steps of: hot rolling a slab containing by weight% carbon (C): 0% (exclusive) to 0.005% (inclusive) silicon (Si): 2.0% to 4.0% (both inclusive) manganese (Mn): 0.1% to 0.5% (both inclusive) ...

The present application relates to a hot stamping part and manufacturing method therefor According to the hot press part and manufacturing method therefor of the present application, a hot press part with suppressed hydrogen embrittlement and ultra-high strength can be obtained.

The present invention provides a plated steel sheet comprising: a cold rolled steel sheet; a plating layer formed on the cold rolled steel sheet; 0.5 3 wt% of aluminum (Al); 1 2 wt% of magnesium (Mg) 0.005 0.1 wt% of silicon (Si); 0.01 0.1 wt% of titanium (Ti); and the balance of zinc (Zn) and other inevitable impu...

The present invention provides a highly corrosion resistant plated steel with excellent corrosion resistance and a manufacturing method therefor. According to an embodiment of the present invention the method for manufacturing the highly corrosion resistant plated steel comprises the steps of: immersing base iron i...

The present invention provides a manufacturing method for hot-stamped parts, the method comprising: a heating step of heating a blank; a transfer step of transferring the heated blank to a press mold including a punch; and a forming and piercing step of hot-forming the transferred blank into the shape of a hot-stamp...

The present invention provides a hot-stamped component having a piercing part formed thereon, comprising: a base material; a mutual diffusion layer disposed on the base material; and a plating layer disposed on the mutual diffusion layer, wherein the hot-stamped component includes a front-end processing surface form...

An aluminum-based plating blank according to one embodiment of the present invention comprises: a first plated steel plate; a second plated steel plate connected to the first plated steel plate; and a joint for connecting the first plated steel plate and the second plated steel plate at the boundary between the firs...

A method for operating an electric furnace is provided. The method for operating an electric furnace comprises the steps of: melting a first iron source in a first melting furnace in which a first electrode part is disposed; preheating a second iron source in a second melting furnace in which a second electrode part...