发明授权
- 专利标题： Silicon steel sheet and method thereof
- 专利标题（中）： 硅钢板及其制造方法
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申请号： US09457551申请日： 1999-12-09
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公开(公告)号： US06241829B1公开(公告)日： 2001-06-05
- 发明人: Koichiro Fujita , Yasushi Tanaka , Hironori Ninomiya , Tatsuhiko Hiratani , Shoji Kasai
- 申请人： Koichiro Fujita , Yasushi Tanaka , Hironori Ninomiya , Tatsuhiko Hiratani , Shoji Kasai
- 优先权： JP7-260042 19951006; JP8-039705 19960227; JP8-165820 19960626
- 主分类号： H01F104
- IPC分类号： H01F104
摘要：
A silicon steel sheet contains 0.01 wt. % or less C, 4 to 10 wt. % Si, 0.5 wt. % or less Mn, 0.01 wt. % or less P, 0.01 wt. % or less S, 0.2 wt. % or less sol. Al, 0.01 wt. % or less N, 0.02 wt. % or less O and the balance being Fe. The silicon steel sheet has grain boundaries and carbides which are precipitated on the grain boundaries. The carbides have an area of 20% or less to an area of the grain boundaries. The steel sheet is cooled at a cooling speed of 5° C./sec. or more in a temperature range of from 300 to 700° C.
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