Technical field
[0001]The present invention relates to a non-oriented electrical steel sheet.
BACKGROUND
[0002]Non-oriented electrical steel sheet, for example, be used in the iron core of the motor, the non-oriented electrical steel sheet, the plate surface in all directions parallel to the superior (hereinafter sometimes referred to as "all directions of the plate plane") magnetic properties, such as low iron loss and high magnetic flux density is required. Previously various techniques have been proposed, it is difficult to obtain sufficient magnetic properties in all directions in the plate surface. For example, even if the sufficient magnetic characteristics can be obtained in a particular direction with the plate surface may not sufficient magnetic characteristics can be obtained in the other directions.
CITATION
Patent Document
[0003]
Patent Document 1: JP-A-3-126845
Patent Document 2: JP 2006-124809 Patent Publication
Patent Document 3: JP 61-231120 Patent Publication
Patent Document 4: JP 2004-197217 Patent Publication
Patent Document 5: JP Japanese Patent No. 5-140648
Patent Document 6: JP 2008-132534 Patent Publication
Patent Document 7: JP 2004-323972 JP
Patent Document 8: JP 62-240714 JP
Patent Document 9: JP 2011-157603 Japanese
Patent Document 10: JP 2008-127659 JP
Summary of the Invention
Problems that the Invention is to Solve
[0004]
　The present invention aims to provide a non-oriented electrical steel sheet can achieve excellent magnetic properties in all directions in the plate surface.
Means for Solving the Problems
[0005]
　The present inventors have conducted extensive studies to solve the above problems. As a result, the chemical composition, it is assumed that the thickness and the average crystal grain size suitable was found to be important. Such production of non-oriented electrical steel sheet, in obtaining a steel strip subjected to cold rolling the hot rolled strip or the like, and controls the columnar Akiraritsu and the average crystal grain size in casting or rapid solidification of the molten steel, controlling the reduction ratio of cold rolling, also revealed that to control the passing plate tension and the cooling rate at the time of finish annealing are important.
[0006]
　The present inventors have found that further intensive studies based on these findings, and conceived to aspects of the invention described below.
[0007]
　(1)
　in
　mass%, C: 0.0030% or
　less,
　Si: 2.00% ~ 4.00%,
　Al: 0.10% ~ 3.00%, Mn: 0.10% ~ 2.00% ,
　S: 0.0030% or
　less, Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, one or more selected from the group consisting of Zn and Cd: less than 0.0015% 0.0003% or more in total ,
　Si content (wt%) [Si], Al content (wt%) [Al], parameter represented by the formula 1 when Mn content (mass%) and [Mn] Q: 2 .00 or
　higher,
　Sn: 0.00% ~ 0.40%,
　Cu: 0.0% ~ 1.0%, Cr: 0.0% ~ 10.0%, and
　the balance: Fe and impurities,
　in expressed have that chemical
　composition, Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, the sulfide or oxysulfide Zn or Cd The total mass of Murrell S is, and the total mass of more than 10% of S contained in the non-oriented electrical steel
　sheet, and the {100} crystal orientation intensity of 3.0 or more,
　is 0.15 mm ~ thick 0. it is 30 mm,
　the non-oriented electrical steel sheet, wherein the average crystal grain size of 65 .mu.m ~ 100 [mu] m.
　Q = [Si] +2 [Al] - [Mn] (式 1)
[0008]
　(2)
　In the above chemical
　composition, Sn: 0.02% ~ 0.40%, or
　Cu: 0.1% ~ 1.0%,
　according to, or both is possible, characterized in that satisfy (1) non-oriented electrical steel sheet.
[0009]
　(3)
　In the above chemical
　composition, Cr: 0.2% ~ 10.0%
　non-oriented electrical steel sheet according to is possible, characterized in that satisfy (1) or (2).
The invention's effect
[0010]
　According to the present invention, the chemical composition, since the thickness and the average grain size is appropriate, it is possible to obtain excellent magnetic properties in all directions in the plate surface.
DESCRIPTION OF THE INVENTION
[0011]
　It will be described in detail embodiments of the present invention.
[0012]
　First, a description will be given molten steel having a chemical composition used in the non-oriented electrical steel sheet and a manufacturing according to an embodiment of the present invention. Although details will be described later, the non-oriented electrical steel sheet according to the embodiment of the present invention, molten steel casting and hot rolling, or molten steel rapid solidification, cold rolling, and is manufactured through the finish annealing and the like. Therefore, the chemical composition of the non-oriented electrical steel sheet and the molten steel is not only characteristic of the non-oriented electrical steel sheet, is taken into consideration these processes. In the following description, "%" is a unit of content of each element contained in the non-oriented electrical steel sheet or the molten steel, in particular means "% by mass" unless otherwise specified. Non-oriented electrical steel sheet according to the present embodiment, C: 0.0030% or less, Si: 2.00% ~ 4.00% , Al: 0.10% ~ 3.00%, Mn: 0.10% ~ 2.00%, S: 0.0030% or less, Mg, Ca, Sr, Ba , Ce, La, Nd, Pr, Zn and selected one or more from the group consisting of Cd: 0.0003% or more in total less than 0.0015%, Si content (wt%) [Si], Al content (wt%) [Al], represented by formula 1 when the Mn content (mass%) and [Mn] that the parameter Q: 2.00 or more, Sn: 0.00% ~ 0.40% , Cu: 0.0% ~ 1.0%, Cr: 0.0% ~ 10.0%, and the balance: Fe and It has a chemical composition represented by the impurities. As the impurity, those included in raw materials such as ores and scrap, intended to be included in the manufacturing process, it is exemplified.
　Q = [Si] +2 [Al ] - [Mn] ( Equation 1)
[0013]
　(C: 0.0030% or less)
　C is to enhance the iron loss, or cause the magnetic aging. Therefore, C content is better as low as possible. This phenomenon, C content is remarkable in 0.0030% or greater. Therefore, C content is made 0.0030% or less. Reduction of C content also contributes to a uniform improvement of the magnetic properties in all directions in the plate surface.
[0014]
　(Si: 2.00% ~
　4.00%) Si is to increase the electrical resistance, reduces the eddy current loss, or reduce iron loss, increase the yield ratio, punching of the core the to or improved. The Si content is less than 2.00%, not be sufficiently achieved these advantages. Therefore, Si content is 2.00% or more. On the other hand, the Si content 4.00 percent, lowered magnetic flux density, punching workability is lowered due to excessive increase in hardness, cold rolling may become difficult. Therefore, Si content is at most 4.00%.
[0015]
　(Al: 0.10% ~
　3.00%) Al is to increase the electrical resistance, reduces the eddy current loss, to reduce iron loss. Al contributes to the improvement of the relative magnitude of the magnetic flux density B50 with respect to the saturation magnetic flux density. Here, the magnetic flux density B50, a magnetic flux density at a magnetic field of 5000A / m. The Al content is less than 0.10%, not be sufficiently achieved these advantages. Therefore, Al content is 0.10% or more. On the other hand, the Al content is 3.00% greater, or decrease the magnetic flux density, thereby decreasing the yield ratio, or reduce the punching workability. Therefore, Al content is at most 3.00%.
[0016]
　(Mn: 0.10% ~
　2.00%) Mn is to increase the electrical resistance, reduces the eddy current loss, to reduce iron loss. The inclusion of Mn, texture obtained in the primary recrystallization, crystals of a plane parallel to the plate surface {100} plane (hereinafter sometimes referred to as "{100} crystal") tends to those developed . {100} crystal is a preferred crystal uniform improvement of the magnetic properties in all directions in the plate surface. Also, the higher the Mn content, the precipitation temperature of MnS increases, precipitated from MnS becomes large. Therefore, the higher the Mn content, the particle size is difficult to precipitate the 100nm about fine MnS for inhibiting the recrystallization and grain growth in the final annealing. The Mn content is less than 0.10%, not be sufficiently achieved these advantages. Therefore, Mn content is 0.10% or more. On the other hand, the Mn content is 2.00% greater than the grain is not sufficiently grown in the finishing annealing, the iron loss is increased. Therefore, Mn content is at most 2.00%.
[0017]
　(S: 0.0030% or less)
　S is not an essential element, is contained as an impurity, for example, in the steel. S is the precipitation of fine MnS, inhibit recrystallization and grain growth in the final annealing. Thus, S content is preferably as low as possible. Such an increase in core loss, S content is remarkable in 0.0030% or greater. Therefore, S content is made 0.0030% or less.
[0018]
　(Mg, Ca, Sr, Ba , Ce, La, Nd, Pr, Zn and selected one or more from the group consisting of Cd: less than 0.0015% 0.0003% or more in
　total) Mg, Ca, Sr, Ba , Ce, La, Nd, Pr, Zn and Cd generates sulfide reacts with S in the molten steel when molten steel casting or rapid solidification or oxysulfide, or both of these precipitates. Hereinafter sometimes Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, collectively Zn and Cd as "coarse precipitate-forming elements". The particle size of the precipitate of coarse precipitates forming element is about 1μm ~ 2μm, MnS, TiN, much larger than the particle size of the fine precipitates such as AlN (about 100 nm). Thus, these fine precipitates is attached to the precipitate of coarse precipitates forming element, it is difficult to inhibit recrystallization and grain growth in the final annealing. Is less than 0.0003% content in total of coarse precipitates forming elements, it can not get these advantageous effects stably. Accordingly, the content of coarse precipitates forming element is a total 0.0003% or more. On the other hand, at a content of coarse precipitates forming elements is 0.0015% or more in total is that the sulfide or oxysulfide or precipitation of both of these, to inhibit recrystallization and grain growth in the final annealing is there. Accordingly, the content of coarse precipitates forming element is less than 0.0015% in total.
[0019]
　: (Parameter Q 2.00 or higher)
　in the equation below parameter Q represented by 1 is 2.00, ferrite - for austenite transformation (alpha-gamma transformation) may occur, upon casting or rapid solidification of the molten steel was produced once or destroyed columnar crystals is by transformation alpha-gamma, the average crystal grain size or smaller. In addition, there is also a fact that the α-γ transformation at the time of finish annealing occurs. Therefore, the parameter Q is less than 2.00, not obtained the desired magnetic properties. Thus, the parameter Q is 2.00 or more.
[0020]
　Sn, Cu and Cr is not an essential element, a good optional elements may optionally be contained in limits a predetermined amount in the non-oriented electrical steel sheet.
[0021]
　(Sn: 0.00% ~ 0.40%, Cu: 0.0% ~
　1.0%) Sn and Cu, to develop a suitable crystal in primary recrystallization to improvement of magnetic properties. Therefore, when include Sn or Cu, or both, even enhanced to a preferred {100} crystal is easily obtained in the texture primary recrystallization development of magnetic properties in all directions in the plate surface. Sn is it suppresses oxidation and nitridation of the surface of the steel sheet during finish annealing, or to suppress the variation of the crystal grain size. Therefore, Sn or Cu, or both of these may be contained. To obtain these effects effects sufficiently, preferably, Sn: 0.02% or more or Cu: 0.1% or more, or both. On the other hand, Sn is in 0.40 percent, unnecessarily or cost is higher the working effect is saturated, the grain growth in the final annealing or is suppressed. Accordingly, Sn content is 0.40% or less. The Cu content of 1.0 percent, the steel sheet is embrittled, may become difficult hot rolling and cold rolling, strip passing the annealing line of finish annealing may become difficult. Therefore, Cu content is 1.0% or less.
[0022]
　(Cr: 0.0% ~
　10.0%) Cr reduces high frequency iron loss. Reduction of the high frequency iron loss contributes to high-speed rotation of the rotating machine, high speed rotation contributes to the miniaturization and high efficiency of the rotating machine. Cr is to increase the electrical resistance, reduces the eddy current loss, to reduce iron loss, such as high-frequency iron loss. Cr reduces the stress sensitivity, contributes to the reduction of deterioration of the magnetic characteristics due to the compression stress acting upon reduction and high-speed rotation of the magnetic characteristics due to compressive stresses introduced in forming the iron core. Thus, Cr may be contained. To obtain these effects effects sufficiently, preferably, Cr: 0.2% or more. On the other hand, Cr content is 10.0 percent, lowered magnetic flux density, or high cost. Therefore, Cr content is at most 10.0%.
[0023]
　There will be described a S in the non-oriented electrical steel sheet according to the embodiment of the present invention. In the non-oriented electrical steel sheet according to the present embodiment, the total mass of S contained in the sulfide or oxysulfide of coarse precipitates forming elements is more than 10% of the total mass of S contained in the non-oriented electrical steel sheet is there. As described above, coarse precipitates forming elements generates a sulfide reacts with S in the molten steel when molten steel casting or rapid solidification or oxysulfide, or both of these precipitates. Thus, the total mass of S contained in the sulfide or oxysulfide of coarse precipitates forming element, it ratio higher total mass of S is contained in the non-oriented electrical steel sheet, product coarse precipitates in an amount sufficient element is included in the non-oriented electrical steel sheet, which means that fine precipitates, such as MnS is effectively attached to the precipitate. Therefore, as the ratio is high, and recrystallization and grain growth is promoted in the finish annealing, obtained excellent magnetic properties. Then, in the above proportion is less than 10%, no recrystallization and grain growth is sufficient in the finish annealing, it can not be obtained excellent magnetic properties.
[0024]
　Next, a description will be given texture of non-oriented electrical steel sheet according to the embodiment of the present invention. The non-oriented electrical steel sheet according to the present embodiment is {100} crystal orientation intensity of 3.0 or more. The {100} than crystal orientation intensity of 3.0, or cause decrease and increase in the core loss of the magnetic flux density, or cause variation in the magnetic characteristics between a direction parallel to the plate surface. {100} crystal orientation strength, X-rays diffractometry or electron beam backscatter diffraction (electron backscatter diffraction: EBSD) can be measured by method. Since the X-ray and the reflection angle such as from a sample of the electron beam is different for each crystal orientation, it is possible to determine the crystal orientation intensity in this reflection intensity or the like based on the random orientation sample.
[0025]
　It will now be described average grain size of the non-oriented electrical steel sheet according to the embodiment of the present invention. The average crystal grain size of the non-oriented electrical steel sheet according to the present embodiment is 65 .mu.m ~ 100 [mu] m. Average or grain size of less than 65 .mu.m, the 100μm greater than a high iron loss W10 / 800. Here, the iron loss W10 / 800, the magnetic flux density of 1.0 T, a core loss at a frequency of 800 Hz.
[0026]
　It will be described the thickness of the non-oriented electrical steel sheet according to the embodiment of the present invention. The thickness of the non-oriented electrical steel sheet according to the present embodiment is, for example, 0.15mm or 0.30mm or less. If the thickness is 0.30mm greater, it is impossible to obtain an excellent high-frequency iron loss. Thus, the thickness is not more than 0.30 mm. When the thickness is less than 0.15 mm, the magnetic properties at the surface of the less stable non-oriented electrical steel sheet is predominant over the magnetic properties of the internal high stability. When the thickness is less than 0.15 mm, or become difficult to strip passing the annealing line of finish annealing, the number of non-oriented electrical steel sheet required for the core of a predetermined size is increased, reduction and increase in the manufacturing cost of the productivity with increasing man-hours or triggered. Therefore, the thickness be at least 0.15 mm.
[0027]
　Next, description will be given of a magnetic characteristic of the non-oriented electrical steel sheet according to the embodiment of the present invention. Non-oriented electrical steel sheet according to the present embodiment, for example, the magnetic flux density at the ring magnetometric B50: 1.67T or more and iron loss W10 / 800: the thickness of the non-oriented electrical steel sheet and t (mm) 30 × [0.45 + 0.55 × { 0.5 × (t / 0.20) + 0.5 × (t / 0.20) when expressed 2 a magnetic characteristic represented by}] W / kg or less it can exhibit.
[0028]
　Ring Measurements of magnetic non-oriented ring-shaped sample taken from the electromagnetic steel sheet, for example, an outer diameter of 5 inches (12.70cm), an inner diameter exciting the ring-shaped sample 4 inch (10.16 cm), the magnetic flux flowing through the entire circumference of the sample. Magnetic properties obtained by the ring magnetic measurements is such as to reflect all directions of the structure of the plate surface.
[0029]
　Next, a description will be given of a first method for producing a non-oriented electrical steel sheet according to the embodiment. In the first manufacturing method, performed casting of molten steel, hot rolling, cold rolling, finishing annealing or the like.
[0030]
　The molten steel casting and hot rolling, performing casting of molten steel having the above chemical composition to prepare a steel ingot such as a slab, by performing the hot rolling, the starting cast structure columnar crystals in a steel ingot such as a slab the proportion of the hot rolled crystal structure is 80% or more in area fraction, and average crystal grain size obtained over a steel strip 0.1 mm.
[0031]
　The columnar crystals, magnetic properties of non-oriented electrical steel sheet, having a uniform increase in the desired {100} <0vw> texture of the magnetic properties in all directions, especially the plate plane. {100} <0vw> The texture, the plane parallel to the plate surface is rolling direction with {100} plane crystal <0vw> orientation is texture developed (v and w are arbitrary real numbers ( v and w are unless both are 0) in. columnar percentage of crystals is less than 80%, {100} crystal by finish annealing can not be obtained texture developed. Thus, the ratio of the columnar crystals 80% ratio. columnar crystals to above can be identified by microscopy. in the first manufacturing method, to the ratio of columnar crystal 80% or more, for example, one surface of the coagulation time of the slab and the temperature difference between the other surface 40 ° C. or higher. this temperature difference, the cooling structure of the mold, the material, the mold taper can be controlled by a mold flux or the like. proportion of such columnar crystals are under the conditions of 80% or more Generation in the case of cast steel, Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn or sulfide or oxysulfide, or both of these Cd is easily generated, fine sulfides such as MnS There is suppressed.
[0032]
　As the average crystal grain size of the steel strip is small, a lot, a wide area of ​​the grain boundary number of grains. The recrystallization finish annealing, where crystals from the crystal grains and grain boundaries grow, whereas the crystal grown from the crystal grains is a desirable magnetic properties {100} crystal, grown from the crystal grain boundary crystal the {111} <112> is an undesirable crystal magnetic properties of the crystal and the like. Therefore, as the average crystal grain size of the steel strip is large, desirable magnetic properties {100} crystal is likely to develop in the finish annealing, particularly when the average crystal grain size of the steel strip is not less than 0.1 mm, excellent magnetic characteristics are easily obtained. Therefore, the average crystal grain size of the steel strip and more 0.1 mm. The average crystal grain size of the steel strip can be adjusted by the start temperature and the take-up temperature of the hot rolling. Start temperature 900 ° C. or less, and if the coiling temperature was 650 ° C. or less, the crystal grains contained in the steel strip becomes crystal grains stretched in the rolling direction in the non-recrystallization, the average crystal grain size is 0.1mm or more of the steel strip is obtained.
[0033]
　Coarse precipitate-forming element is in advance was poured into the bottom of the last pot prior to casting in the steelmaking process, and injecting a molten steel containing elements other than coarse precipitates forming elements to the pan, coarse precipitates produced in the molten steel it is preferred to dissolve the elements. Thus, it is possible to hardly scattered from molten steel coarse precipitate-forming element, also can promote the reaction of the coarse precipitates forming elements and S. Last pot prior to casting in the steel making process is, for example, a pan directly above the tundish of a continuous casting machine.
[0034]
　When the reduction ratio of cold rolling is 90 percent, the time of finish annealing, the texture of inhibiting the improvement of magnetic properties, e.g., {111} <112> texture is likely to develop. Therefore, the reduction ratio of cold rolling is 90% or less. When the reduction ratio of cold rolling is less than 40%, it may ensure the accuracy and flatness of the thickness of the non-oriented electrical steel sheet becomes difficult. Therefore, the reduction ratio of cold rolling is preferably 40% or more.
[0035]
　The finish annealing, causing the growth of primary recrystallization and grain, the average grain diameter is 65 .mu.m ~ 100 [mu] m. This finish annealing, texture preferred {100} crystal uniform improvement of magnetic properties developed in all directions in the plate surface is obtained. In the finish annealing, for example, a holding temperature of 900 ° C. or higher 1000 ° C. or less, the holding time to 60 seconds or less 10 seconds or more.
[0036]
　When the strip passing tension finish annealing to 3MPa greater, elastic strain having anisotropy is likely to remain in the non-oriented electrical in steel. Since elastic strain having anisotropy for deforming the texture, even if obtained texture {100} crystal has developed, which is deformed and the uniformity of the magnetic properties in the sheet plane decreases. Accordingly, the sheet passing tension finish annealing is not more than 3 MPa. Even when the cooling rate at 950 ° C. ~ 700 ° C. of finish annealing and 1 ° C. / sec greater, elastic strain having anisotropy is likely to remain in the non-oriented electrical in steel. Therefore, the cooling rate at 950 ° C. ~ 700 ° C. of finish annealing is less 1 ° C. / sec.
[0037]
　In this way, it is possible to produce a non-oriented electrical steel sheet according to the present embodiment. After finish annealing, it may form an insulating film by coating and baking.
[0038]
　Next, a description will be given of a second method for producing a non-oriented electrical steel sheet according to the embodiment. In the second manufacturing method, carried out rapid solidification of molten steel, cold rolling, finishing annealing or the like.
[0039]
　The rapid solidification of the molten steel, the molten steel having the above chemical composition, rapidly solidified on the surface of the cooling body moving update, the ratio of the columnar crystals are in an area fraction of 80% or more, and an average crystal grain size of more than 0.1mm get the steel strip.
[0040]
　In the second production method, in order to the ratio of columnar crystal 80% or more, for example, increasing 25 ° C. or higher than the freezing temperature the temperature to be injected into the surface of the cooling body to move update of the molten steel. In particular, when the temperature of molten steel was raised 40 ° C. or higher than the freezing temperature can be the ratio of the columnar crystals almost 100%. If the proportion of such a columnar crystal is solidified molten steel under the conditions of 80% or more, Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, sulfide of Zn or Cd or oxysulfide or their both are easily generated, the generation of fine sulfides such as MnS is suppressed.
[0041]
　In the second manufacturing method, the average crystal grain size of the steel strip and more 0.1 mm. The average crystal grain size of the steel strip can be adjusted by the cooling rate or the like in the molten steel temperature and the surface of the cooling body at the time of injection to the surface of the cooling body at the time of rapid solidification.
[0042]
　Upon rapid solidification, coarse precipitates forming elements are previously was poured into the bottom of the last pot prior to casting in the steelmaking process, and injecting a molten steel containing elements other than coarse precipitates forming elements in the pan, in the molten steel it is preferred to dissolve the coarse precipitates forming elements. Thus, it is possible to hardly scattered from molten steel coarse precipitate-forming element, also can promote the reaction of the coarse precipitates forming elements and S. Last pot prior to casting in the steel making process is the pan directly above the tundish of a casting machine for example rapid solidification.
[0043]
　Cold rolling and finish annealing may be performed under the same conditions as the first manufacturing method.
[0044]
　In this way, it is possible to produce a non-oriented electrical steel sheet according to the present embodiment. After finish annealing, it may form an insulating film by coating and baking.
[0045]
　Non-oriented electrical steel sheet according to the present embodiment exhibits a uniform excellent magnetic properties in all directions in the plate surface, used in the rotating machine, the iron core of electrical equipment small transformers and electrical Hinto . Also, the non-oriented electrical steel sheet according to the present embodiment can also contribute to higher efficiency and miniaturization of the rotating machine.
[0046]
　Having described in detail preferred embodiments of the present invention, the present invention is not limited to such an example. It would be appreciated by those skilled in the relevant field of technology of the present invention, within the scope of the technical idea described in the claims, it is intended to cover various changes and modifications , also such modifications are intended to fall within the technical scope of the present invention.
Example
[0047]
　Next, the non-oriented electrical steel sheet according to the embodiment of the present invention will be specifically described below showing Examples. Examples shown below are only just an example of the non-oriented electrical steel sheet according to the embodiment of the present invention, the non-oriented electrical steel sheet according to the present invention is not limited to the following examples.
[0048]
　(First test)
　In the first test, by casting a molten steel having the chemical compositions shown in Table 1 to prepare a slab to obtain a steel strip by performing the hot rolling of the slab. Blank in Table 1 indicates that the content of the element is less than the detection limit, the balance being Fe and impurities. Underlined in Table 1 indicates that the value is out of range of the present invention. Then, to prepare a variety of non-oriented electrical steel sheet subjected to cold rolling and finish annealing of the steel strip. Then, the ratio R to the total mass of S to each of the non-oriented electrical steel sheet, contained in the total mass of the non-oriented electrical steel sheet S contained in the sulfide or oxysulfide of coarse precipitates forming elements S , {100 } crystal orientation intensity I, thickness was measured t and the average grain size r. The results are shown in Table 2. Underlined in Table 2 indicates that the value is out of range of the present invention.
[0049]
[Table 1]

[0050]
[Table 2]

[0051]
　Then, to measure the magnetic characteristics of the non-oriented electrical steel sheet. This measurement, outer diameter of 5 inches and an inner diameter using four inch ring sample. In other words, it was ring magnetic measurements. The results are shown in Table 3. Underlined in Table 3, the figures indicate that not in the desired range. That is, underlined column iron loss W10 / 800 indicates that this is criterion W0 (W / kg) or of the formula 2.
　= 30 × W0 [0.45 + 0.55 × {0.5 × (t / 0.20) + 0.5 × (t / 0.20) 2 }] (Equation 2)
[0052]
[table 3]

[0053]
　As shown in Table 3, Sample No. 11 ~ No. In 20, is in the range chemical composition of the present invention, the ratio R S because, the {100} crystal orientation intensity I, thickness t and average grain size r is within the scope of the present invention, good in the ring magnetometry results were obtained.
[0054]
　Sample No. In 1, the ratio R S because it was too low, the iron loss W10 / 800 was large. Sample No. In 2, since {100} crystal orientation intensity I is too low, the iron loss W10 / 800 was large. Sample No. In 3, since the thickness t is too small, iron loss W10 / 800 was large. Sample No. In 4, since the thickness t is too large, the iron loss W10 / 800 was large. Sample No. In 5, since the average grain size r is too small, core loss W10 / 800 was large. Sample No. In 6, since the average grain size r is too large, the iron loss W10 / 800 was large. Sample No. In 7, since the S content was too high, core loss W10 / 800 was large. Sample No. In 8, since the total content of coarse precipitates forming element is too low, the iron loss W10 / 800 was large. Sample No. In 9, since the total content of coarse precipitates forming element is too high, core loss W10 / 800 was large. Sample No. At 10, for parameter Q is too small, iron loss W10 / 800 was large.
[0055]
　(Second test)
　in the second test, in mass%, C: 0.0023%, Si : 3.46%, Al: 0.63%, Mn: 0.20%, S: 0.0003% and Pr: containing 0.0008%, by casting a molten steel balance being Fe and impurities to form a slab, by performing hot rolling of the slab thickness was obtained steel strip 1.4mm . The average crystal of the steel band to adjust the temperature difference to adjust the start temperature and the coiling temperature of columnar proportion of crystals and hot rolling of the slab is a starting material of the strip between the two surfaces of the slab during casting changing the particle size. Table 4 shows the temperature difference, the average crystal grain size of the rate and band steel columnar crystals between 2 surfaces. Then, by performing a cold rolling at a reduction ratio 78.6% thickness was obtained steel sheets 0.30 mm. Thereafter, by performing the continuous finish annealing of 30 seconds at 950 ° C., to obtain a non-oriented electrical steel sheet. Then, the ratio R to the total mass of S to each of the non-oriented electrical steel sheet, contained in the total mass of the non-oriented electrical steel sheet S contained in the sulfide or oxysulfide of coarse precipitates forming elements S , {100 } crystal orientation intensity I, thickness was measured t and the average grain size r. The results are also shown in Table 4. Underlined in Table 4 indicates that the numerical value is outside the scope of the present invention.
[0056]
[Table 4]

[0057]
　Then, to measure the magnetic characteristics of the non-oriented electrical steel sheet. This measurement, outer diameter of 5 inches and an inner diameter using four inch ring sample. In other words, it was ring magnetic measurements. The results are shown in Table 5. Underlined in Table 5, the figures indicate that not in the desired range. That is, the underlined column iron loss W10 / 800 indicates that the criteria W0 (W / kg) or more, indicating that the underlined column of the magnetic flux density B50 is less than 1.67T.
[0058]
[table 5]

[0059]
　As shown in Table 5, the sample rate of the columnar crystals of the slab which is the starting material with the appropriate strip No. In 33, the ratio R S because, the {100} crystal orientation intensity I, thickness t and average grain size r is within the scope of the present invention, good results in ring magnetic measurements were obtained.
[0060]
　Sample No. with strip ratio of columnar crystals in the slab is too low the starting material In 31, the ratio R S and for {100} crystal orientation intensity I is too low, large core loss W10 / 800, the magnetic flux density B50 is low. Sample No. with strip ratio of columnar crystals in the slab is too low the starting material In 32, since {100} crystal orientation intensity I is too low, large core loss W10 / 800, the magnetic flux density B50 is low.
[0061]
　(Third test)
　In a third test, by casting a molten steel having the chemical compositions shown in Table 6 to prepare a slab, by performing the hot rolling of this slab, thickness of steel strip 1.2mm Obtained. Balance being Fe and impurities, underlined in Table 6 indicates that the numerical value is outside the scope of the present invention. The average crystal of the steel band to adjust the temperature difference to adjust the start temperature and the coiling temperature of columnar proportion of crystals and hot rolling of the slab is a starting material of the strip between the two surfaces of the slab during casting changing the particle size. The temperature difference between the two surfaces was 53 ℃ ~ 64 ℃. Table 7 shows the average crystal grain size ratio of the columnar crystals and steel strip. Then, by performing a cold rolling at a reduction rate of 79.2%, thickness was obtained steel sheet 0.25 mm. Thereafter, by performing the continuous final annealing for 45 seconds at 920 ° C., to obtain a non-oriented electrical steel sheet. Then, the ratio R to the total mass of S to each of the non-oriented electrical steel sheet, contained in the total mass of the non-oriented electrical steel sheet S contained in the sulfide or oxysulfide of coarse precipitates forming elements S , {100 } crystal orientation intensity I, thickness was measured t and the average grain size r. The results are also shown in Table 7. Underlined in Table 7 indicates that the value is out of range of the present invention.
[0062]
[Table 6]

[0063]
[Table 7]

[0064]
　Then, to measure the magnetic characteristics of the non-oriented electrical steel sheet. This measurement, outer diameter of 5 inches and an inner diameter using four inch ring sample. In other words, it was ring magnetic measurements. The results are shown in Table 8. Underlined in Table 8, the figures indicate that not in the desired range. That indicates that the underlined column of the magnetic flux density B50 is less than 1.67T.
[0065]
[Table 8]

[0066]
　As shown in Table 8, the sample chemical composition, proportions and the average crystal grain size of the columnar crystal slab is a starting material with the appropriate strip No. In 44, the ratio R S because, the {100} crystal orientation intensity I, thickness t and average grain size r is within the scope of the present invention, good results in ring magnetic measurements were obtained.
[0067]
　Samples with strip average crystal grain size is too low No. 41 and No. In 42, since {100} crystal orientation intensity I is too low, the magnetic flux density B50 is low. Sample No. In 43, the total content of coarse precipitates forming elements and proportions R S because it was too low, the magnetic flux density B50 is low. Sample No. In 45, is too high total content of coarse precipitates forming elements, since the average grain size r is too small, the magnetic flux density B50 is low.
[0068]
　(Fourth Test)
　In the fourth test, by casting a molten steel having the chemical compositions shown in Table 9 to prepare a slab, by performing the hot rolling of this slab, the steel strip thickness shown in Table 10 Obtained. Blank in Table 9, show that the content of the element is less than the detection limit, the balance being Fe and impurities. The average crystal grain of the steel band to adjust the temperature difference to adjust the start temperature and the coiling temperature ratio and hot rolling of columnar crystals of the slab is steel strip starting material between two surfaces of the slab during casting the diameter was changed. The temperature difference between the two surfaces was 49 ℃ ~ 76 ℃. Table 10 shows the average crystal grain size of the ratio of columnar crystals and steel strip. Then, by performing a cold rolling at a reduction ratio shown in Table 10, the thickness was obtained steel sheets 0.20 mm. Thereafter, by performing the continuous finish annealing of 40 seconds at 930 ° C., to obtain a non-oriented electrical steel sheet. Then, the ratio R to the total mass of S to each of the non-oriented electrical steel sheet, contained in the total mass of the non-oriented electrical steel sheet S contained in the sulfide or oxysulfide of coarse precipitates forming elements S , {100 } crystal orientation intensity I, thickness was measured t and the average grain size r. The results are also shown in Table 10. Underlined in Table 10 indicates that the number is out of range of the present invention.
[0069]
[Table 9]

[0070]
[Table 10]

[0071]
　Then, to measure the magnetic characteristics of the non-oriented electrical steel sheet. This measurement, outer diameter of 5 inches and an inner diameter using four inch ring sample. In other words, it was ring magnetic measurements. The results are shown in Table 11. Underlined in Table 11, the figures indicate that not in the desired range. That is, the underlined column iron loss W10 / 800 indicates that the criteria W0 (W / kg) or more, indicating that the underlined column of the magnetic flux density B50 is less than 1.67T.
[0072]
[Table 11]

[0073]
　As shown in Table 11, the chemical composition, using the proportions and average crystal grain size appropriate strip of the slab columnar crystal which is a starting material, the samples were subjected to cold rolling with a suitable reduction ratio No. 51 ~ No. In 55, the ratio R S because, the {100} crystal orientation intensity I, thickness t and average grain size r is within the scope of the present invention, good results in ring magnetic measurements were obtained. Samples containing appropriate quantities of Sn or Cu No. 53 and No. In 54, especially excellent magnetic flux density B50 was obtained. Samples containing appropriate quantities of the Cr No. In 55, the iron loss W10 / 800 is obtained particularly good.
[0074]
　The sample was too high a reduction ratio of cold rolling No. In 56, since {100} crystal orientation intensity I is too low, large core loss W10 / 800, the magnetic flux density B50 is low.
[0075]
　(Fifth test)
　In the fifth test, by mass%, C: 0.0014%, Si : 3.03%, Al: 0.28%, Mn: 1.42%, S: 0.0017% and Sr: containing 0.0007% by casting the molten steel balance being Fe and impurities to form a slab, by performing hot rolling of the slab thickness was obtained steel strip 0.8mm . 90% the ratio of columnar crystals in the slab is a starting material of the strip temperature difference between the two surfaces of the slab during casting as 61 ° C., the steel strip by adjusting the starting temperature and coiling temperature of hot rolling the average crystal grain size of a 0.17 mm. Then, by performing a cold rolling at a reduction ratio 81.3% thickness was obtained steel sheets 0.15 mm. Thereafter, by performing the continuous finish annealing of 20 seconds at 970 ° C., to obtain a non-oriented electrical steel sheet. The finish annealing was varied the cooling rate from the strip passing tension and 950 ° C. to 700 ° C.. Table 12 shows the Tsuban tension and the cooling rate. Then, the ratio R to the total mass of S to each of the non-oriented electrical steel sheet, contained in the total mass of the non-oriented electrical steel sheet S contained in the sulfide or oxysulfide of coarse precipitates forming elements S , {100 } crystal orientation intensity I, thickness was measured t and the average grain size r. The results are also shown in Table 12.
[0076]
[Table 12]

[0077]
　Then, to measure the magnetic characteristics of the non-oriented electrical steel sheet. This measurement, outer diameter of 5 inches and an inner diameter using four inch ring sample. In other words, it was ring magnetic measurements. The results are shown in Table 13.
[0078]
[Table 13]

[0079]
　As shown in Table 13, Sample No. 61 ~ No. In 64, is in the range chemical composition of the present invention, the ratio R S because, the {100} crystal orientation intensity I, thickness t and average grain size r is within the scope of the present invention, good in the ring magnetometry results were obtained. The sample passing plate tension was less than 3MPa No. 62 and No. In 63, a low elastic strain anisotropy, iron loss W10 / 800 and the magnetic flux density B50 is obtained particularly good. The cooling rate from 950 ° C. to 700 ° C. 1 ° C. / sec or less and the Sample No. In 64, further low elastic strain anisotropy, better iron loss W10 / 800 and the magnetic flux density B50 was obtained. In the measurement of elastic strain anisotropy, with 55mm in length of each side, two sides parallel to the rolling direction, two sides planar shape parallel to a direction perpendicular to the rolling direction (sheet width direction) 4 cut out rectangular sample from each non-oriented electrical steel sheets was measured lengths of the sides after deformation under the influence of elastic strain. The length of the direction perpendicular to the rolling direction was determined greater much than the length of the rolling direction.
[0080]
　(Sixth test)
　In the test of the sixth to give the steel strip by rapid solidification by a twin roll method molten steel having the chemical composition shown in Table 14. Blank in Table 14 show that the content of the element is less than the detection limit, the balance being Fe and impurities. Underlined in Table 14 indicates that the number is out of range of the present invention. Then, to prepare a variety of non-oriented electrical steel sheet subjected to cold rolling and finish annealing of the steel strip. Then, the ratio R to the total mass of S to each of the non-oriented electrical steel sheet, contained in the total mass of the non-oriented electrical steel sheet S contained in the sulfide or oxysulfide of coarse precipitates forming elements S , {100 } crystal orientation intensity I, thickness was measured t and the average grain size r. The results are shown in Table 15. Underlined in Table 15 indicates that the number is out of range of the present invention.
[0081]
[Table 14]

[0082]
[Table 15]

[0083]
　Then, to measure the magnetic characteristics of the non-oriented electrical steel sheet. This measurement, outer diameter of 5 inches and an inner diameter using four inch ring sample. In other words, it was ring magnetic measurements. The results are shown in Table 16. Underlined in Table 16, the figures indicate that not in the desired range. That is, underlined column iron loss W10 / 800 indicates that this is criterion W0 (W / kg) or of the formula 2.
　= 30 × W0 [0.45 + 0.55 × {0.5 × (t / 0.20) + 0.5 × (t / 0.20) 2 }] (Equation 2)
[0084]
[Table 16]

[0085]
　As shown in Table 16, Sample No. 111 ~ No. In 120, in the range chemical composition of the present invention, the ratio R S because, the {100} crystal orientation intensity I, thickness t and average grain size r is within the scope of the present invention, good in the ring magnetometry results were obtained.
[0086]
　Sample No. In 101, the ratio R S because it was too low, the iron loss W10 / 800 was large. Sample No. In 102, for {100} crystal orientation intensity I is too low, the iron loss W10 / 800 was large. Sample No. In 103, since the thickness t is too small, iron loss W10 / 800 was large. Sample No. In 104, since the thickness t is too large, the iron loss W10 / 800 was large. Sample No. In 105, since the average grain size r is too small, core loss W10 / 800 was large. Sample No. In 106, since the average grain size r is too large, the iron loss W10 / 800 was large. Sample No. In 107, because the S content was too high, core loss W10 / 800 was large. Sample No. In 108, for a total amount of coarse precipitates forming element is too low, the iron loss W10 / 800 was large. Sample No. In 109, for a total amount of coarse precipitates forming element is too high, core loss W10 / 800 was large. Sample No. In 110, for the parameter Q is too small, iron loss W10 / 800 was large.
[0087]
　(Seventh test)
　In the test of the seventh, in mass%, C: 0.0023%, Si : 3.46%, Al: 0.63%, Mn: 0.20%, S: 0.0003% and Nd: containing 0.0008%, the molten steel and the balance being Fe and impurities rapidly solidified by a twin roll method, the thickness was obtained steel strip 1.4 mm. At this time, the injection temperature adjusted by changing the columnar ratio and the average crystal grain size of the crystals of the steel strip. Table 17 shows the injection temperature and the difference between the solidification temperature, the average crystal grain size of the ratio of columnar crystals and steel strip. Then, by performing a cold rolling at a reduction ratio 78.6% thickness was obtained steel sheets 0.30 mm. Thereafter, by performing the continuous finish annealing of 30 seconds at 950 ° C., to obtain a non-oriented electrical steel sheet. Then, the ratio R to the total mass of S to each of the non-oriented electrical steel sheet, contained in the total mass of the non-oriented electrical steel sheet S contained in the sulfide or oxysulfide of coarse precipitates forming elements S , {100 } crystal orientation intensity I, thickness was measured t and the average grain size r. The results are also shown in Table 17. Underlined in Table 17 indicates that the number is out of range of the present invention.
[0088]
[Table 17]

[0089]
　Then, to measure the magnetic characteristics of the non-oriented electrical steel sheet. This measurement, outer diameter of 5 inches and an inner diameter using four inch ring sample. In other words, it was ring magnetic measurements. The results are shown in Table 18. Underlined in Table 18, the figures indicate that not in the desired range. That is, the underlined column iron loss W10 / 800 indicates that the criteria W0 (W / kg) or more, indicating that the underlined column of the magnetic flux density B50 is less than 1.67T.
[0090]
[Table 18]

[0091]
　As shown in Table 18, the sample rate of the columnar crystal is used a suitable strip No. In 133, the ratio R S because, the {100} crystal orientation intensity I, thickness t and average grain size r is within the scope of the present invention, good results in ring magnetic measurements were obtained.
[0092]
　Sample No. with strip ratio of the columnar crystals is too low In 131, the ratio R S and for {100} crystal orientation intensity I is too low, large core loss W10 / 800, the magnetic flux density B50 is low. Sample No. with strip ratio of the columnar crystals is too low In 132, for {100} crystal orientation intensity I is too low, large core loss W10 / 800, the magnetic flux density B50 is low.
[0093]
　(Eighth test)
　In the test of the eighth, the molten steel having the chemical composition shown in Table 19 by rapidly solidified by a twin roll method, the thickness was obtained steel strip 1.2 mm. Balance being Fe and impurities, underlined in Table 19 indicates that the number is out of range of the present invention. At this time, the injection temperature adjusted by changing the columnar ratio and the average crystal grain size of the crystals of the steel strip. The injection temperature was increased 29 ° C. ~ 35 ° C. than the freezing temperature. Table 20 shows the average crystal grain size of the ratio of columnar crystals and steel strip. Then, by performing a cold rolling at a reduction rate of 79.2%, thickness was obtained steel sheet 0.25 mm. Thereafter, by performing the continuous final annealing for 45 seconds at 920 ° C., to obtain a non-oriented electrical steel sheet. Then, the ratio R to the total mass of S to each of the non-oriented electrical steel sheet, contained in the total mass of the non-oriented electrical steel sheet S contained in the sulfide or oxysulfide of coarse precipitates forming elements S , {100 } crystal orientation intensity I, thickness was measured t and the average grain size r. The results are also shown in Table 20. Underlined in Table 20 indicates that the number is out of range of the present invention.
[0094]
[Table 19]

[0095]
[Table 20]

[0096]
　Then, to measure the magnetic characteristics of the non-oriented electrical steel sheet. This measurement, outer diameter of 5 inches and an inner diameter using four inch ring sample. In other words, it was ring magnetic measurements. The results are shown in Table 21. Underlined in Table 21, the figures indicate that not in the desired range. That indicates that the underlined column of the magnetic flux density B50 is less than 1.67T.
[0097]
[Table 21]

[0098]
　As shown in Table 21, the chemical composition, the ratio and the average crystal grain size of the columnar crystal is used a suitable strip Sample No. In 144, the ratio R S because, the {100} crystal orientation intensity I, thickness t and average grain size r is within the scope of the present invention, good results in ring magnetic measurements were obtained.
[0099]
　Samples with strip average crystal grain size is too low No. 141 and No. In 142, for {100} crystal orientation intensity I is too low, the magnetic flux density B50 is low. Sample No. In 143, the total content of coarse precipitates forming elements and proportions R S because it was too low, the magnetic flux density B50 is low. Sample No. In 145, is too high total content of coarse precipitates forming elements, since the average grain size r is too small, the magnetic flux density B50 is low.
[0100]
　(Ninth test)
　In the test of the ninth, the molten steel having the chemical composition shown in Table 22 by rapidly solidified by a twin roll method, to obtain a steel strip thickness shown in Table 23. Blank in the table 22 showed that the content of the element is less than the detection limit, the balance being Fe and impurities. At this time, the injection temperature adjusted by changing the columnar ratio and the average crystal grain size of the crystals of the steel strip. The injection temperature was 28 ° C. ~ 37 ° C. higher than the freezing temperature. Table 23 shows the average crystal grain size of the ratio of columnar crystals and steel strip. Then, by performing a cold rolling at a reduction ratio shown in Table 23, the thickness was obtained steel sheets 0.20 mm. Thereafter, by performing the continuous finish annealing of 40 seconds at 930 ° C., to obtain a non-oriented electrical steel sheet. Then, the ratio R to the total mass of S to each of the non-oriented electrical steel sheet, contained in the total mass of the non-oriented electrical steel sheet S contained in the sulfide or oxysulfide of coarse precipitates forming elements S , {100 } crystal orientation intensity I, thickness was measured t and the average grain size r. The results are also shown in Table 23. Underlined in Table 23 indicates that the number is out of range of the present invention.
[0101]
[Table 22]

[0102]
[Table 23]

[0103]
　Then, to measure the magnetic characteristics of the non-oriented electrical steel sheet. This measurement, outer diameter of 5 inches and an inner diameter using four inch ring sample. In other words, it was ring magnetic measurements. The results are shown in Table 24. Underlined in Table 24, the figures indicate that not in the desired range. That is, the underlined column iron loss W10 / 800 indicates that the criteria W0 (W / kg) or more, indicating that the underlined column of the magnetic flux density B50 is less than 1.67T.
[0104]
[Table 24]

[0105]
　As shown in Table 24, the chemical composition, the ratio and the average crystal grain size of the columnar crystal is using appropriate steel strip was subjected to cold rolling at a proper rolling reduction Sample No. 151 ~ No. In 155, the ratio R S because, the {100} crystal orientation intensity I, thickness t and average grain size r is within the scope of the present invention, good results in ring magnetic measurements were obtained. Samples containing appropriate quantities of Sn or Cu No. 153 and No. In 154, especially excellent magnetic flux density B50 was obtained. Samples containing appropriate quantities of the Cr No. In 155, iron loss W10 / 800 is obtained particularly good.
[0106]
　The sample was too high a reduction ratio of cold rolling No. In 156, for {100} crystal orientation intensity I is too low, large core loss W10 / 800, the magnetic flux density B50 is low.
[0107]
　(Tenth test)
　In the test of the 10, in mass%, C: 0.0014%, Si : 3.03%, Al: 0.28%, Mn: 1.42%, S: 0.0017% and Sr: containing 0.0007% molten steel the balance being Fe and impurities rapidly solidified by a twin roll method, the thickness was obtained steel strip 0.8 mm. At this time, the injection temperature was 32 ° C. higher than the freezing temperature of 90 percent columnar proportion of crystals of the steel strip, an average crystal grain diameter is 0.17 mm. Then, by performing a cold rolling at a reduction ratio 81.3% thickness was obtained steel sheets 0.15 mm. Thereafter, by performing the continuous finish annealing of 20 seconds at 970 ° C., to obtain a non-oriented electrical steel sheet. The finish annealing was varied the cooling rate from the strip passing tension and 950 ° C. to 700 ° C.. Shows the Tsuban tension and the cooling rate in Table 25. Then, the ratio R to the total mass of S to each of the non-oriented electrical steel sheet, contained in the total mass of the non-oriented electrical steel sheet S contained in the sulfide or oxysulfide of coarse precipitates forming elements S , {100 } crystal orientation intensity I, thickness was measured t and the average grain size r. The results are also shown in Table 25.
[0108]
[Table 25]

[0109]
　Then, to measure the magnetic characteristics of the non-oriented electrical steel sheet. This measurement, outer diameter of 5 inches and an inner diameter using four inch ring sample. In other words, it was ring magnetic measurements. The results are shown in Table 26.
[0110]
[Table 26]

[0111]
　As shown in Table 26, Sample No. 161 ~ No. In 164, in the range chemical composition of the present invention, the ratio R S because, the {100} crystal orientation intensity I, thickness t and average grain size r is within the scope of the present invention, good in the ring magnetometry results were obtained. The sample passing plate tension was less than 3MPa No. 162 and No. In 163, a low elastic strain anisotropy, iron loss W10 / 800 and the magnetic flux density B50 is obtained particularly good. The cooling rate from 950 ° C. to 700 ° C. 1 ° C. / sec or less and the Sample No. In 164, yet low elastic strain anisotropy, better iron loss W10 / 800 and the magnetic flux density B50 was obtained. In the measurement of elastic strain anisotropy, with 55mm in length of each side, two sides parallel to the rolling direction, two sides planar shape parallel to a direction perpendicular to the rolling direction (sheet width direction) 4 cut out rectangular sample from each non-oriented electrical steel sheets was measured lengths of the sides after deformation under the influence of elastic strain. The length of the direction perpendicular to the rolling direction was determined greater much than the length of the rolling direction.
Industrial Applicability
[0112]
　The present invention is, for example, can be used in industrial application of the manufacturing industry and non-oriented electrical steel sheet of a non-oriented electrical steel sheet.

The scope of the claims

[Requested item 1]By
　mass%, C: 0.0030% or
　less,
　Si: 2.00% ~
　4.00%, Al: 0.10% ~ 3.00%, Mn: 0.10% ~
　2.00%, S: 0.0030% or
　less, Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, one or more selected from the group consisting of Zn and Cd: less than 0.0015% 0.0003% or more in
　total, Si-containing the amount (mass%) [Si], Al content (wt%) [Al], parameter represented by the formula 1 when Mn content (mass%) and [Mn] Q: 2.00 or more ,
　Sn:
　0.00% ~ 0.40%, Cu:
　0.0% ~ 1.0%, Cr: 0.0% ~ 10.0%, and
　the balance: Fe and impurities,
　in represented by the chemical composition It
　has, include Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, the sulfide or oxysulfide Zn or Cd The total mass of S is, and the total mass of more than 10% of S contained in the non-oriented electrical steel
　sheet, and the {100} crystal orientation intensity of 3.0 or more,
　is at 0.15 mm ~ 0.30 mm thick There,
　the non-oriented electrical steel sheet, wherein the average crystal grain size of 65 .mu.m ~ 100 [mu] m.
　Q = [Si] +2 [Al ] - [Mn] ( Equation 1)
[Requested item 2]
　In the chemical
　composition, Sn: 0.02% ~ 0.40%, or
　Cu: 0.1% ~ 1.0%,
　or non-oriented according to claim 1, characterized in that both of these are met sex electromagnetic steel sheet.
[Requested item 3]
　In the chemical
　composition, Cr: 0.2% ~ 10.0%
　non-oriented electrical steel sheet according to claim 1 or 2, characterized in that is met.