发明授权
- 专利标题: Method for manufacturing of insulated soft magnetic metal powder formed body
- 专利标题(中): 绝缘软磁金属粉末成型体的制造方法
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申请号: US11994272申请日: 2006-07-03
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公开(公告)号: US07871474B2公开(公告)日: 2011-01-18
- 发明人: Kenichi Unoki , Kenichi Nagai , Shoichi Yamasaki , Yuji Soda
- 申请人: Kenichi Unoki , Kenichi Nagai , Shoichi Yamasaki , Yuji Soda
- 申请人地址: JP Tokyo
- 专利权人: Mitsubishi Steel Mfg. Co. Ltd.
- 当前专利权人: Mitsubishi Steel Mfg. Co. Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Knobbe Martens Olson & Bear LLP
- 优先权: JP2005-193892 20050701
- 国际申请: PCT/JP2006/313628 WO 20060703
- 国际公布: WO2007/004727 WO 20070111
- 主分类号: H01F1/24
- IPC分类号: H01F1/24 ; H01F1/22
摘要:
A method for manufacturing bodies formed from insulated soft magnetic metal powder by forming an insulating film of an inorganic substance on the surface of particles of a soft magnetic metal powder, compacting and molding the powder, then carrying out a heat treatment to provide a body formed from insulated soft magnetic metal powder the method comprising: compacting and molding the powder; then magnetically annealing the powder at a high temperature above the Curie temperature for the soft magnetic metal powder and below the threshold temperature at which the insulating film is destroyed in a non-oxidizing atmosphere, such as a vacuum, inert gas, or the like; and then carrying out a further heat treatment at a temperature of from 400° C. to 700° C. in an oxidizing atmosphere, such as air, or the like.
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