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公开(公告)号:US06527876B2
公开(公告)日:2003-03-04
申请号:US09423509
申请日:2000-01-24
申请人: Misao Namikawa , Yoshikazu Takada , Shoji Kasai , Hironori Ninomiya , Tsunehiro Yamaji , Tatsuhiko Hiratani
发明人: Misao Namikawa , Yoshikazu Takada , Shoji Kasai , Hironori Ninomiya , Tsunehiro Yamaji , Tatsuhiko Hiratani
IPC分类号: H01F1147
CPC分类号: C23C16/56 , C21D8/1255 , C22C38/004 , C22C38/02 , C23C10/08 , C23C10/46 , C23C10/60 , C23C16/24
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.
摘要翻译: 具有低频铁损的硅钢板具有Si浓度高于钢板中心部分的Si浓度的钢板表面层。 板厚中心的Si浓度为3.4wt。 %以上,钢板表层的Si浓度为5重量%。 % 或者更多。 表层部的Si浓度为5〜8重量%。 %。 生产方法包括硅化处理和扩散处理。 控制硅化和扩散速度,控制钢板厚度方向的Si浓度分布。