公开(公告)号：US20190024205A9

公开(公告)日：2019-01-24

申请号：US15743776

申请日：2016-08-25

Applicant: JFE STEEL CORPORATION

Inventor： Yoshihiko ODA ,  Tadashi NAKANISHI ,  Tomoyuki OKUBO ,  Yoshiaki ZAIZEN ,  Hiroaki NAKAJIMA

IPC: C21D9/46 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  H01F1/147

Abstract: 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.

公开(公告)号：US20180001369A1

公开(公告)日：2018-01-04

申请号：US15543077

申请日：2016-01-07

Applicant: JFE STEEL CORPORATION

Inventor： Kunihiro SENDA ,  Masanori UESAKA ,  Yoshihiko ODA

IPC: B21D28/14 ,  H01F41/061 ,  B21D43/28 ,  H01F1/147 ,  B26F1/42 ,  C22C38/00

CPC classification number: B21D28/14 ,  B21D28/22 ,  B21D35/005 ,  B21D35/007 ,  B21D43/287 ,  B26F1/42 ,  C22C38/00 ,  C22C38/06 ,  C22C38/60 ,  H01F1/14716 ,  H01F1/16 ,  H01F41/02 ,  H01F41/061

Abstract: 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：US20160203896A1

公开(公告)日：2016-07-14

申请号：US14909978

申请日：2014-08-11

Applicant: JFE STEEL CORPORATION

Inventor： Tadashi NAKANISHI ,  Shinji KOSEKI ,  Yoshihiko ODA ,  Hiroaki TODA

IPC: H01F1/16 ,  C22C38/34 ,  C22C38/16 ,  H02K1/02 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/60 ,  C22C38/08

CPC classification number: C22C38/00 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1272 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/16 ,  C22C38/34 ,  C22C38/60 ,  H01F1/16 ,  H02K1/02

Abstract: A non-oriented electrical steel sheet having a chemical composition comprising C: not more than 0.010 mass %, Si: 1.0-7.0 mass %, Mn: 0.001-3.0 mass %, sol. Al: 0.0001-3.5 mass %, P: 0.01-0.2 mass %, S: not more than 0.010 mass %, N: not more than 0.010 mass % and the remainder being Fe and inevitable impurities, wherein a ratio (P120/Fe700) of a peak-peak height P120 of P near to an electronic energy of 120 eV to a peak-peak height Fe700 of Fe near to an electronic energy of 700 eV in an Auger differential spectrum obtained by analyzing a broken surface of a grain boundary through Auger electron spectroscopy is not less than 0.1 and a sheet thickness is 0.10-0.50 mm, and a motor using such a non-oriented electrical steel sheet as an iron core.

Abstract translation: 化学成分为C：0.010质量％以下，Si：1.0〜7.0质量％，Mn：0.001-3.0质量％的无取向电工钢板。 Al：0.0001-3.5质量％，P：0.01〜0.2质量％，S：0.010质量％以下，N：0.010质量％以下，其余为Fe和不可避免的杂质，其中，比率（P120 / Fe700） 在靠近120eV的电子能量的P的峰 - 峰高度P120与通过分析晶界的破碎表面分析所获得的俄歇微分光谱中接近700eV的电子能量的Fe的峰 - 峰高Fe700 俄歇电子能谱法不小于0.1，板厚度为0.10-0.50mm，使用这种无取向电工钢板作为铁芯的电动机。