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公开(公告)号：US20230065674A1
公开(公告)日：2023-03-02
申请号：US17977178
申请日：2022-10-31
IPC分类号： C21D9/46 , B32B15/01 , C21D6/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/60 , H01F1/147
摘要： A non-oriented electrical steel sheet with an average magnetostriction λp-p at 400 Hz and 1.0 T of not more than 4.5×10−6, and area ratio of recrystallized grains at a section in rolling direction of steel sheet of 40 to 95% and an average grain size of 10 to 40 μm is obtained by subjecting a steel slab containing, in mass %, C: not more than 0.005%, Si: 2.8 to 6.5%, Mn: 0.05 to 2.0%, Al: not more than 3.0%, P: not more than 0.20%, S: not more than 0.005%, N: not more than 0.005%, Ti: not more than 0.003%, V: not more than 0.005% and Nb: not more than 0.005% and satisfying Si-2Al-Mn≥0 to hot rolling, hot-band annealing, cold rolling and finish annealing under adequate cold rolling and finish annealing conditions, and a motor core is manufactured by such a steel sheet.
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公开(公告)号：US20220375667A1
公开(公告)日：2022-11-24
申请号：US17755318
申请日：2020-05-13
摘要： Provides is a non-oriented electrical steel sheet suitable for use in a rotor of an IPM motor that has excellent magnetic flux density B50 and high-frequency iron loss properties, high tensile strength and fatigue strength, and little variation in tensile strength. The non-oriented electrical steel sheet has a predetermined steel sheet chemical composition and a microstructure in which a ratio of non-recrystallized microstructure is 5% or more and 70% or less and the number of inclusion having a diameter of 5 μm or more is not more than 5 counts/mm2.
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公开(公告)号：US20220239202A1
公开(公告)日：2022-07-28
申请号：US17611781
申请日：2020-05-15
摘要： A method for manufacturing a motor core includes a step of manufacturing a motor core by performing melt-cutting on an electrical steel sheet using heat input from a surface, the electrical steel sheet having an average thermal conductivity in depth positions from the surface to one-third depth of a sheet thickness lower than a thermal conductivity in a middle position in a sheet thickness direction by 30% or greater.
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公开(公告)号：US20190330710A1
公开(公告)日：2019-10-31
申请号：US16476937
申请日：2018-01-12
IPC分类号： C21D9/46 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/12 , C21D8/00 , C21D6/00 , H01F1/147
摘要： According to the disclosure, it is possible to increase the magnetic flux density and reduce iron loss by setting a chemical composition containing, by mass %, C: 0.0050% or less, Si: 1.50% or more and 4.00% or less, Al: 0.500% or less, Mn: 0.10% or more and 5.00% or less, S: 0.0200% or less, P: 0.200% or less, N: 0.0050% or less, O: 0.0200% or less, and at least one of Sb: 0.0010% or more and 0.10% or less, and Sn: 0.0010% or more and 0.10% or less, with the balance being Fe and inevitable impurities, an Ar3 transformation temperature of 700° C. or higher, a grain size of 80 μm or more and 200 μm or less, and a Vickers hardness of 140 HV or more and 230 HV or less.
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公开(公告)号：US20220372600A1
公开(公告)日：2022-11-24
申请号：US17770709
申请日：2020-10-12
摘要： A non-oriented electrical steel sheet produced by hot-rolling a steel slab containing Si: 2.8 to 6.5 mass % and Zn: 0.0005 to 0.0050 mass % followed by cold rolling and finish annealing, a coating agent containing at least one element from Sn, Sb, P, S, Se, As, Te, B, Pb, and Bi is applied to the surface after annealing forming an insulation coating with nitriding-suppressing ability. Alternatively, an intermediate layer containing at least one element from Sn, Sb, P, S, Se, As, Te, B, Pb, and Bi and having a nitriding-suppressing ability forms on the steel sheet iron matrix after the annealing and forms an insulation coating, without above elements, on the intermediate layer thus obtaining a non-oriented electrical steel sheet wherein a high strength rotor core with and stator core with excellent magnetic is simultaneously obtained, and a motor core including a stator core and rotor core from the steel sheet.
In a production of a non-oriented electrical steel sheet by hot-rolling a steel slab containing Si: 2.8 to 6.5 mass % and Zn: 0.0005 to 0.0050 mass % followed by cold rolling and finish annealing, a coating agent containing at least one element selected from Sn, Sb, P, S, Se, As, Te, B, Pb, and Bi is applied to the steel sheet surface after the finish annealing to form an insulation coating with a nitriding-suppressing ability. Alternatively, an intermediate layer containing at least one element selected from Sn, Sb, P, S, Se, As, Te, B, Pb, and Bi and having a nitriding-suppressing ability is formed on the steel sheet iron matrix after the finish annealing and form an insulation coating not containing above elements is formed on the intermediate layer thus to obtain a non-oriented electrical steel sheet from which a rotor core with high strength and stator core with excellent magnetic properties after the stress-relief annealing can be obtained at the same time, and a motor core comprising a stator core and rotor core is produced from the steel sheet.-
公开(公告)号：US20220195570A1
公开(公告)日：2022-06-23
申请号：US17594382
申请日：2020-04-13
发明人： Yukino MIYAMOTO , Yoshiaki ZAIZEN , Yoshihiko ODA
摘要： A non-oriented electrical steel sheet having: low high-frequency iron loss and high magnetic flux density; an inner layer and surface layers provided on both sides of the inner layer, the surface layers and the inner layer having specific chemical compositions; the thickness t of 0.01 mm to 0.35 mm; a multilayer ratio of ti to t of 0.10 to 0.70, t1 denoting a total thickness of the surface layers; a difference between [Si]1 and [Si]0 of 1.0 mass % to 4.5 mass % or less, [Si]1 denoting a Si content in each of the surface layers and [Si]0 denoting a Si content in the inner layer; and a difference between [Mn]0 and [Mn]1 of 0.01 mass % to 0.40 mass %, [Mn]0 denoting a Mn content at a mid-thickness position t/2 and [Mn]1 denoting an average Mn content in a region from a surface to a position at a depth of ( 1/10)t.
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公开(公告)号：US20180202021A1
公开(公告)日：2018-07-19
申请号：US15743776
申请日：2016-08-25
IPC分类号： C21D9/46 , C22C38/14 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/12 , C21D8/00 , C21D6/00 , H01F1/147
CPC分类号： C21D9/46 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C2202/02 , H01F1/14775 , H01F1/16 , H02K1/02
摘要： Iron loss is reduced by increasing magnetic flux density. A non-oriented electrical steel sheet has a chemical composition containing, by mass %, C: 0.0050% or less, Si: 1.50% or more and 4.00% or less, Al: 0.500% or less, Mn: 0.10% or more and 5.00% or less, S: 0.0200% or less, P: 0.200% or less, N: 0.0050% or less, and O: 0.0200% or less, with the balance consisting of Fe and inevitable impurities, in which the steel sheet has an Ar3 transformation temperature of 700° C. or higher, a grain size of 80 μm or more and 200 μm or less, a Vickers hardness of 140 HV or more and 230 HV or less.
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8.发明申请HOT-ROLLED STEEL SHEET FOR PRODUCING NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD OF PRODUCING SAME 有权用于生产非导电电工钢板的热轧钢板及其生产方法公开(公告)号：US20150348686A1
公开(公告)日：2015-12-03
申请号：US14759891
申请日：2014-01-16
IPC分类号： H01F1/147 , C21D6/00 , C21D9/46 , C22C38/60 , H01F41/02 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , H01F1/16 , C21D8/12 , C22C38/12
CPC分类号： H01F1/14775 , B21B3/02 , C21D6/005 , C21D6/008 , C21D8/12 , C21D8/1222 , C21D8/1255 , C21D8/1261 , C21D9/46 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/60 , H01F1/14791 , H01F1/16 , H01F41/02
摘要： By using a hot-rolled steel sheet of a predetermined chemical composition, and annealing the hot-rolled steel sheet in nitrogen atmosphere at 1000° C. for 30 seconds, and then immersing in a solution of 7% HCl at 80° C. for 60 seconds to obtain a hot-rolled steel sheet having a pickling weight loss of 10 g/m2 or more and 35 g/m2 or less, it is possible to obtain a hot-rolled steel sheet for producing a non-oriented electrical steel sheet that not only has excellent magnetic properties such as iron loss properties and magnetic flux density, but also has reduced steel sheet surface defects and an excellent manufacturing yield.
摘要翻译： 通过使用规定的化学成分的热轧钢板，在1000℃的氮气气氛中对该热轧钢板退火30秒，然后在80℃下浸渍在7％HCl的溶液中， 60秒以获得酸洗重量减少为10g / m 3以上且35g / m 2以下的热轧钢板，可以得到用于制造无方向性电工钢板的热轧钢板 不仅具有优异的磁性能，例如铁损特性和磁通密度，而且还减少了钢板表面缺陷和优异的制造成品率。
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公开(公告)号：US20240290523A1
公开(公告)日：2024-08-29
申请号：US18574305
申请日：2022-06-30
IPC分类号： H01F1/147 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/34 , C22C38/60
CPC分类号： H01F1/14783 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/007 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1277 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/34 , C22C38/60 , C22C2202/02
摘要： Provided is a non-oriented electrical steel sheet having good fatigue resistance suitable for rotor cores and excellent magnetic properties suitable for stator cores. The non-oriented electrical steel sheet has a chemical composition of C: 0.01% or less, Si: 2.0% to 5.0%, Mn: 0.05% to 5.00%, P: 0.1% or less, S: 0.01% or less, Al: 3.0% or less and N: 0.005% or less, with the balance being Fe and inevitable impurities, where Si+Al is 4.5% or more. For the crystal grains in the steel sheet, the average grain size X1 is 60 μm to 200 μm, the standard deviation S1 of the crystal grain size distribution satisfies the specified formula (1), and the skewness γ1 of the crystal grain size distribution is 1.50 or less.
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公开(公告)号：US20240279783A1
公开(公告)日：2024-08-22
申请号：US18571720
申请日：2022-06-30
CPC分类号： C22C38/02 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C21D9/46 , C22C38/004 , C22C38/04 , C22C38/06 , C21D2201/05
摘要： Provided are a high-strength non-oriented electrical steel sheet having good fatigue resistance suitable for rotor cores and a non-oriented electrical steel sheet having excellent magnetic properties suitable for stator cores. The non-oriented electrical steel sheet has a chemical composition of C: 0.01% or less, Si: 2.0% to 5.0%, Mn: 0.05% to 5.00%, P: 0.1% or less, S: 0.01% or less, Al: 3.0% or less and N: 0.005% or less, with the balance being Fe and inevitable impurities, where Si+Al is 4.5% or more. For the crystal grains in the steel sheet, the average grain size X1 is 50 μm or less, the standard deviation S1 of the grain size distribution satisfies the specified formula (1), and the skewness γ1 of the grain size distribution is 2.00 or less.
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