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1.发明授权公开(公告)号：US11114227B2
公开(公告)日：2021-09-07
申请号：US16065352
申请日：2016-12-14
发明人： Masanori Uesaka , Kunihiro Senda , Takeshi Omura
IPC分类号： H01F1/16 , C21D8/12 , C22C38/02 , C22C38/04 , C22C38/00 , C22C38/14 , C22C38/60 , C22C38/06 , H01F1/147 , C21D9/46 , C21D1/76
摘要： A non-oriented electrical steel sheet has low iron loss even under inverter excitation and can be suitably used as the iron core of a motor. The non-oriented electrical steel sheet has a specific chemical composition and an average grain size r of 40 μm to 120 μm. An area ratio R of a total area of grains having a grain size of ⅙ or less of the thickness of the steel sheet to a cross-sectional area of the steel sheet is 2% or greater, and the average grain size r (μm) and the area ratio R (%) satisfy a condition represented by Expression (1), R>−2.4×r+200 (1).
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公开(公告)号：US10919081B2
公开(公告)日：2021-02-16
申请号：US15543077
申请日：2016-01-07
发明人： Kunihiro Senda , Masanori Uesaka , Yoshihiko Oda
IPC分类号： B21D28/14 , B26F1/42 , H01F1/147 , B21D43/28 , C22C38/00 , C22C38/06 , H01F41/02 , B21D35/00 , B21D28/22 , H01F41/061 , H01F1/16 , C22C38/60
摘要： A punching method includes: punching out a plurality of electrical steel sheets in a stacked state by a mold, wherein sheet thicknesses of the electrical steel sheets are set to be 0.35 mm or less, a Vickers hardness (test force 1 kg) of the sheets is set to be 150 to 400, and an average crystal grain size of the sheets is set to be 50 to 250 μm, a clearance of the mold is set to be 7% or more of a minimum sheet thickness of the sheet thicknesses of the electrical steel sheets and equal to or lower than 7% of a total sheet thickness of the electrical steel sheets, and a pressure that a sheet presser of the mold applies to the electrical steel sheets is set to be 0.10 MPa or more.
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公开(公告)号：US11649532B2
公开(公告)日：2023-05-16
申请号：US17055601
申请日：2019-05-20
IPC分类号： C22C38/10 , C21D8/12 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/00 , C22C38/08 , C21D9/68
CPC分类号： C22C38/105 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D9/46 , C21D9/68 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08
摘要： Provided is a non-oriented electrical steel sheet that contains substantially no Al and contains large amounts of Si and Mn and has low iron loss, comprising a chemical composition containing C: 0.0050% or less, Si: 2.0% or more and 6.0% or less, Mn: 1.0% or more and 3.0% or less, P: 0.20% or less, S: 0.0050% or less, N: 0.0050% or less, Al: 0.0050% or less, and one or more selected from B: 0.0001% or more and 0.0050% or less, Nb: 0.0001% or more and 0.0050% or less, and V: 0.0005% or more and 0.0500% or less, with a balance consisting of Fe and inevitable impurities, wherein a number density of Si—Mn nitrides with an average diameter of 50 nm or more and 500 nm or less is 1 or less per μm3.
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4.发明申请公开(公告)号：US20210332463A1
公开(公告)日：2021-10-28
申请号：US17281075
申请日：2019-09-05
摘要： Provided is a non-oriented electrical steel sheet having such a low Al concentration so that it is excellent in terms of the recycling efficiency of scrap iron and having a high magnetic flux density and low iron loss.
The non-oriented electrical steel sheet according to the present invention has a chemical composition containing C; 0.0050 mass % or less, Si; 1.5 mass % to 5.0 mass %, Mn; 0.2 mass % to 3.0 mass %, sol.Al; 0.0030 mass % or less, P; 0.2 mass % or less, S; 0.0050 mass % or less, N; 0.0040 mass % or less, T.Ca; 0.0010 mass % to 0.0080 mass %, T.O; 0.0100 mass % or less, REM; 0.0001 mass % to 0.0050 mass %, and a balance of Fe and inevitable impurities, in which a value of a mass-related fractional expression ((T.Ca+REM)/(T.O+S)), which is a relational expression for the masses of the four constituents described above, that is, T.Ca, REM, T.O, and S, is 0.4 or more.-
公开(公告)号：US11045902B2
公开(公告)日：2021-06-29
申请号：US15575920
申请日：2016-07-06
发明人： Shigehiro Takajo , Masanori Uesaka
IPC分类号： B23K26/073 , C25F3/06 , C23F1/28 , B23K26/364 , C21D8/12 , C21D10/00 , H01F1/16
摘要： A linear groove formation method of forming linear grooves in a steel sheet surface using etching can form linear grooves of a uniform shape while suppressing a decrease in magnetic property of a grain-oriented electrical steel sheet caused by laser irradiation for resist removal. A linear groove formation method includes: coating a surface of a grain-oriented electrical steel sheet with a resist; performing a laser scan cyclically in a rolling direction of the grain-oriented electrical steel sheet, the laser scan being applying a laser while scanning the laser in a direction crossing the rolling direction to remove the resist in a portion irradiated with the laser; and etching the grain-oriented electrical steel sheet in each portion in which the resist is removed, to form a linear groove. A coating thickness of the resist is 0.5 μm to 10 μm, and a power of the laser is 1500 W or more.
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6.发明授权公开(公告)号：US11005345B2
公开(公告)日：2021-05-11
申请号：US16335949
申请日：2017-08-22
发明人： Kunihiro Senda , Masanori Uesaka , Yoshihiko Oda
摘要： A punch processing method for electrical steel sheets to manufacture core segments includes: stacking a plurality of electrical steel sheets; and punching out the plurality of electrical steel sheets in a stacked state simultaneously to manufacture the core segments, wherein in a case where the core segments are applied to a stator core in which a maximum magnetic flux density at a tooth portion is to be higher than a maximum magnetic flux density at a back yoke portion, degrees of Vickers hardness of an electrical steel sheet located second from a bottom side and above in the stacked state are set to 180 HV or higher, and 10 HV or higher than a value of degree of Vickers hardness of an electrical steel sheet located on the bottom side in the stacked state.
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公开(公告)号：US10889875B2
公开(公告)日：2021-01-12
申请号：US16432274
申请日：2019-06-05
发明人： Masayasu Nagoshi , Tomohiro Matsushima , Makoto Watanabe , Shigehiro Takajo , Toshito Takamiya , Masanori Uesaka , Takashi Terashima
IPC分类号： C21D9/46 , G01N21/62 , H01F1/18 , C21D8/12 , G01N23/225 , H01F1/16 , C22C38/02 , G01N23/2251 , H01F27/245 , H02K1/02 , H02K1/06
摘要： A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.
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公开(公告)号：US20180350518A1
公开(公告)日：2018-12-06
申请号：US15756775
申请日：2016-08-22
摘要： A laminated core manufacturing device includes: an overlapping unit configured to overlap the plurality of laminated core materials conveyed along different conveyance routes; an edge position correction unit configured to align edge positions in a width direction of the plurality of laminated core materials between the plurality of laminated core materials and to correct shift of each edge position of the plurality of laminated core materials with respect to a standard edge position; an uplift prevention unit configured to prevent uplift of the plurality of laminated core materials; and a punching unit configured to punch out the plurality of laminated core materials which are overlapped by the overlapping unit and have been subjected to a process to align the edge positions and to correct shift of the edge positions performed by the edge position correction unit, and a process to prevent the uplift performed by the uplift prevention unit.
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9.发明申请公开(公告)号：US20160012949A1
公开(公告)日：2016-01-14
申请号：US14770913
申请日：2014-02-24
IPC分类号： H01F1/147 , C21D3/04 , C21D1/26 , C21D9/46 , C22C38/02 , C22C38/60 , C22C38/04 , C22C38/16 , C22C38/00 , C22C38/06 , C22C38/12 , C22C38/40 , C22C38/34 , H01F1/16 , H01F41/02 , C21D8/12
CPC分类号： H01F1/14775 , C21D1/26 , C21D3/04 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1266 , C21D8/1272 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/34 , C22C38/40 , C22C38/60 , H01F1/16 , H01F41/02
摘要： In a method for producing a grain-oriented electrical steel sheet by hot rolling a raw steel material containing C: 0.002˜0.10 mass %, Si: 2.0˜8.0 mass % and Mn: 0.005˜1.0 mass % to obtain a hot rolled sheet, subjecting the hot rolled sheet to a hot band annealing as required and further to one cold rolling or two or more cold rollings including an intermediate annealing therebetween to obtain a cold rolled sheet having a final sheet thickness, subjecting the cold rolled sheet to a primary recrystallization annealing combined with decarburization annealing, applying an annealing separator to the steel sheet surface and then subjecting to a final annealing, when rapid heating is performed at a rate of not less than 50° C./s in a range of 100˜700° C. in the heating process of the primary recrystallization annealing, the steel sheet is subjected to a holding treatment at any temperature of 250˜600° C. for 0.5˜10 seconds 2 to 6 times to thereby obtain a grain-oriented electrical steel sheet being low in the iron loss and small in the deviation of the iron loss value.
摘要翻译： 在通过热轧含有C：0.002〜0.10质量％，Si：2.0〜8.0质量％，Mn：0.005〜1.0质量％的原料钢来制造方向性电磁钢板的方法中，得到热轧板， 对热轧板根据需要进行热带退火，并进一步进行一次冷轧或两次以上的冷轧，包括中间退火，得到最终板厚的冷轧板，对冷轧板进行一次再结晶 退火与脱碳退火相结合，在钢板表面施加退火分离剂，然后进行最终退火，当以不低于50℃/秒的速度进行快速加热时，在100〜700℃的范围内 在一次再结晶退火的加热过程中，将钢板在250〜600℃的任何温度下进行保持处理0.5〜10秒2〜6次，得到晶粒取向电 铁损低铁损，铁损偏差偏小。
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公开(公告)号：US11946123B2
公开(公告)日：2024-04-02
申请号：US18296997
申请日：2023-04-07
IPC分类号： C22C38/10 , C21D8/12 , C21D9/46 , C21D9/68 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08
CPC分类号： C22C38/105 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D9/46 , C21D9/68 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08
摘要： Provided is a method of easily producing a non-oriented electrical steel sheet that contains substantially no Al and contains large amounts of Si and Mn and has low iron loss, comprising hot rolling a slab having a specified chemical composition to obtain a hot-rolled sheet; coiling the hot-rolled sheet; cold rolling the hot-rolled sheet once or twice with intermediate annealing being performed therebetween, to obtain a cold-rolled sheet; and subjecting the cold-rolled sheet to final annealing, wherein the hot-rolled sheet after the hot rolling is cooled at an average cooling rate from 800° C. to 650° C. of 30° C./s or more, and thereafter the coiling is performed at 650° C. or less.
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