发明授权
- 专利标题： Grain oriented electromagnetic steel sheets having a very low iron loss
- 专利标题（中）： 具有非常低铁损的晶粒取向电磁钢板
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申请号： US225546申请日： 1988-07-28
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公开(公告)号： US4906530A公开(公告)日： 1990-03-06
- 发明人: Ujiihiro Nishiike , Yasuhiro Kobayashi , Hirotake Ishitobi , Shiqeko Sujita , Norio Takahashi , Hisanao Nakahara , Yukio Inokuti
- 申请人： Ujiihiro Nishiike , Yasuhiro Kobayashi , Hirotake Ishitobi , Shiqeko Sujita , Norio Takahashi , Hisanao Nakahara , Yukio Inokuti
- 申请人地址： JPX
- 专利权人： Kawasaki Steel Corp.
- 当前专利权人： Kawasaki Steel Corp.
- 当前专利权人地址： JPX
- 优先权： JPX62-191520 19870801; JPX62-191521 19870801
- 主分类号： C21D8/12
- IPC分类号： C21D8/12
摘要：
A grain oriented electromagnetic steel sheet having a very low iron loss is obtained by subjecting a surface of base metal in the sheet after finish annealing to a particular mechanical polishing and has a surface roughness having a center-line average roughness of not more than 0.3 .mu.m after the polishing and the number of abrasive grains embedded in a layer just beneath polished surface of not more than 20,000 grains/cm.sup.2.