发明名称 |
Silicon steel sheet and method for producing the same |
摘要 |
A silicon steel sheet having low iron loss of high frequency has a surface layer of the steel sheet which has Si concentration higher than Si concentration of a center portion of the steel sheet. Si concentration of sheet thickness center is 3.4 wt. % or more and Si concentration of the surface layer of the steel sheet is 5 wt. % or more. Si concentration in a surface layer portion is 5 to 8 wt. %. The production method comprises siliconizing treatment and diffusing treatment. Velocity of siliconizing and diffusing are controlled, and Si concentration distribution in the sheet thickness direction of the steel sheet is controlled.
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申请公布号 |
US6527876(B2) |
申请公布日期 |
2003.03.04 |
申请号 |
US20000423509 |
申请日期 |
2000.01.24 |
申请人 |
NKK CORPORATION |
发明人 |
NAMIKAWA MISAO;TAKADA YOSHIKAZU;KASAI SHOJI;NINOMIYA HIRONORI;YAMAJI TSUNEHIRO;HIRATANI TATSUHIKO |
分类号 |
C21D8/12;C22C38/00;C22C38/02;C23C10/08;C23C10/46;C23C10/60;C23C16/24;C23C16/56;(IPC1-7):H01F1/147 |
主分类号 |
C21D8/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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