发明授权
- 专利标题: High-strength non-oriented electrical steel sheet
- 专利标题(中): 高强度无取向电工钢板
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申请号: US12309622申请日: 2007-06-15
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公开(公告)号: US08557058B2公开(公告)日: 2013-10-15
- 发明人: Yoshihiro Arita , Hidekuni Murakami , Yutaka Matsumoto , Saori Haranaka , Takeshi Kubota
- 申请人: Yoshihiro Arita , Hidekuni Murakami , Yutaka Matsumoto , Saori Haranaka , Takeshi Kubota
- 申请人地址: JP Tokyo
- 专利权人: Nippon Steel & Sumitomo Metal Corporation
- 当前专利权人: Nippon Steel & Sumitomo Metal Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Kenyon & Kenyon LLP
- 优先权: JP2006-203396 20060726
- 国际申请: PCT/JP2007/062551 WO 20070615
- 国际公布: WO2008/013015 WO 20080131
- 主分类号: H01F3/00
- IPC分类号: H01F3/00 ; H01F1/04 ; C22C38/00
摘要:
The invention provides a non-oriented electrical steel sheet excellent in yield strength for use as an iron core material for high rpm motors that does not sacrifice yield or productivity in motor core punching or steel sheet production, which non-oriented electrical steel sheet is given a chemical composition of, in mass %, C: 0.01 to 0.05%, Si: 2.0 to 4.0%, Mn: 0.05 to 0.5%, Al: 3.0% or less and Nb: 0.01 to 0.05%, and optionally Ni at a preferable content of more than 0.5% and less than 3.0%, the balance being Fe and unavoidable impurities, Mn and C contents expressed in mass % are made to satisfy Mn≦0.6-10×C, recrystallized portion area fraction is made 50% or greater, yield strength in tensile testing is made 650 MPa or greater, and average-grain diameter viewed in steel sheet cross-section is made 40 μm or less, and electrical steel sheet production is conducted using a hot-rolled sheet whose transition temperature in impact testing is 70° C. or less.
公开/授权文献
- US20090301609A1 High-Strength Non-Oriented Electrical Steel Sheet 公开/授权日:2009-12-10
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