发明授权
US5123979A Alloy for Fe Nd B type permanent magnet, sintered permanent magnet and
process for obtaining it
失效
适用于有限责任公司的永磁电机，烧结永磁体及其制造工艺
- 专利标题： Alloy for Fe Nd B type permanent magnet, sintered permanent magnet and process for obtaining it
- 专利标题（中）： 适用于有限责任公司的永磁电机，烧结永磁体及其制造工艺
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申请号： US617648申请日： 1990-11-26
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公开(公告)号： US5123979A公开(公告)日： 1992-06-23
- 发明人: Philippe Tenaud , Fernand Vial , Masato Sagawa
- 申请人： Philippe Tenaud , Fernand Vial , Masato Sagawa
- 申请人地址： FRX St. Pierre D/Allevard
- 专利权人： Aimants Ugimag SA
- 当前专利权人： Aimants Ugimag SA
- 当前专利权人地址： FRX St. Pierre D/Allevard
- 优先权： FRX8916732 19891201
- 主分类号： C22C1/04
- IPC分类号： C22C1/04 ; B22F9/02 ; C21D6/00 ; C22C33/02 ; C22C38/00 ; C22C38/10 ; C22C38/16 ; H01F1/053 ; H01F1/057 ; H01F7/02
摘要：
The invention relates to Fe Nd B type alloys for permanent magnets, the permanent magnets thus obtained and a method of producing them.They have high magnetic characteristics with good temperature resistance and good resistance to atmospheric corrosion.They comprise, in at%, 12 to 18% of rare earths, 3 to 30% of Co, 5.9 to 12% of B, 2 to 10% of V, some Al and Cu, the remainder being iron and unavoidable impurities. The V can be substituted by other refractory elements (Nb, W, Cr, Mo, Ti, Zr, Hf, Ta).The method mainly involves sintering at between 1050 and 1110.degree. C. followed by annealing at between 850 and 1050.degree. C. and/or artificial ageing at between 560.degree. C. and 850.degree. C.
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