公开(公告)号：US11114227B2

公开(公告)日：2021-09-07

申请号：US16065352

申请日：2016-12-14

申请人： JFE STEEL CORPORATION

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).

公开(公告)号：US10919081B2

公开(公告)日：2021-02-16

申请号：US15543077

申请日：2016-01-07

申请人： JFE STEEL CORPORATION

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.

公开(公告)号：US20170342519A1

公开(公告)日：2017-11-30

申请号：US15538459

申请日：2015-10-13

申请人： JFE STEEL CORPORATION

发明人： MASANORI UESAKA ,  Kunihiro Senda ,  Yoshihiko Oda

IPC分类号： C21D8/12 ,  H01F41/02 ,  H01F27/245 ,  H01F3/02 ,  C22C38/06 ,  H02K15/02 ,  C21D9/46

CPC分类号： C21D8/1233 ,  B32B15/011 ,  C21D8/0236 ,  C21D8/12 ,  C21D9/46 ,  C22C38/06 ,  H01F3/02 ,  H01F27/245 ,  H01F41/0206 ,  H01F41/0233 ,  H02K15/02

摘要： A material for laminated iron cores is used as plural steel sheets to be overlapped with one another and punched when a laminated iron core is manufactured. A surface roughness of the steel sheets forming the material for laminated iron cores is at an arithmetic mean roughness Ra of 0.40 [μm] or less, and a sheet thickness deviation in a sheet width direction of at least a portion used as the laminated iron core is 3 [μm] or less per 500 [mm], the portion being of the steel sheets forming the material for laminated iron cores.

公开(公告)号：US20170263357A1

公开(公告)日：2017-09-14

申请号：US15606074

申请日：2017-05-26

申请人： JFE Steel Corporation

发明人： Kunihiro Senda ,  Hirotaka Inoue ,  Seiji Okabe

IPC分类号： H01F1/147 ,  C25F3/14 ,  C22C38/00 ,  C22C38/60 ,  H01F1/16 ,  C22C38/02 ,  C25F3/06 ,  C22C38/06 ,  C22C38/16 ,  C21D8/12 ,  C21D1/26 ,  C25F1/06 ,  B21B3/02 ,  C22C38/04

CPC分类号： H01F1/14775 ,  B21B3/02 ,  B21B2001/221 ,  C21D1/26 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1244 ,  C21D8/1283 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  C22C38/60 ,  C25F1/06 ,  C25F3/06 ,  C25F3/14 ,  H01F1/16 ,  Y10T428/24545

摘要： A method of manufacturing a grain oriented electrical steel sheet includes subjecting a steel slab to a rolling process including cold rolling to obtain a steel sheet with a final sheet thickness, the steel slab containing by mass % C: 0.01% to 0.20%, Si: 2.0% to 5.0%, Mn: 0.03% to 0.20%, sol. Al: 0.010% to 0.05%, N: 0.0010% to 0.020%, at least one element selected from S and Se in a total of 0.005% to 0.040%, and the balance including Fe and incidental impurities; forming, by a chemical process, a linear groove extending in a direction forming an angle of 45° or less with a direction orthogonal to a rolling direction of the steel sheet; subjecting the steel sheet to decarburization annealing; applying an annealing separator thereon mainly composed of MgO; and subjecting the steel sheet to final annealing to manufacture a grain oriented electrical steel sheet.

公开(公告)号：US20160230240A1

公开(公告)日：2016-08-11

申请号：US15022710

申请日：2014-08-26

申请人： JFE STEEL CORPORATION

发明人： Kunihiro Senda ,  Shigehiro Takajo ,  Tomoyuki Okubo

IPC分类号： C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/04

CPC分类号： C21D8/1244 ,  C21D6/005 ,  C21D6/008 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/125 ,  C21D8/1261 ,  C21D8/1266 ,  C21D8/1272 ,  C21D8/1277 ,  C21D8/1283 ,  C21D8/1288 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  H01F1/16

摘要： Provided is a grain-oriented electrical steel sheet including: a forsterite base film formed on a surface of the steel sheet; and an insulating tension coating formed on the base film, in which when Ti intensity FX(Ti), Al intensity FX(Al), and Fe intensity FX(Fe) obtained through quantitative analysis by performing fluorescent X-ray analysis on the surface of the steel sheet satisfy FX(Ti)/FX(Al)≧0.15 and FX(Ti)/FX(Fe)≧0.004, the frequency of crystal boundaries of secondary recrystallized grains in the direction orthogonal to the rolling direction is 20 grain boundaries/100 mm or less, the mean thickness of the forsterite base film t(Fo) and the thickness of the insulating tension coating t(C) satisfies t(Fo)/t(C)≧0.3, and magnetic domain refining treatment is performed by irradiation with a laser beam, plasma flame, or electron beam, a sufficient iron loss reducing effect is achieved in a range where coating detachment does not occur.

摘要翻译： 本发明提供一种晶粒取向电工钢板，其特征在于，包括：在所述钢板表面形成的镁橄榄石基膜; 以及在基底膜上形成的绝缘张力涂层，其中当通过在表面上进行荧光X射线分析通过​​定量分析获得的Ti强度FX（Ti），Al强度FX（Al）和Fe强度FX（Fe） 钢板满足FX（Ti）/ FX（Al）≥0.15，FX（Ti）/ FX（Fe）≥0.004，二次再结晶晶粒在与轧制方向正交的方向上的晶界的频率为20个晶界/ 100mm以下，镁橄榄石基膜t（Fo）的平均厚度和绝缘张力涂层t（C）的厚度满足t（Fo）/ t（C）≥0.3，磁畴精制处理通过 在激光束，等离子体火焰或电子束照射下，在不发生涂层剥离的范围内，实现足够的铁损降低效果。