发明名称 |
ALLOY FLAKE FOR RARE EARTH MAGNET, PRODUCTION METHOD THEREOF, ALLOY POWDER FOR RARE EARTH SINTERED MAGNET, RARE EARTH SINTERED MAGNET, ALLOY POWDER FOR BONDED MAGNET AND BONDED MAGNET |
摘要 |
Disclosed is a rare earth magnet in the R-T-B rare earth element-transition metal-boron system that is made from an improved composition and properties of main phase alloy in the R-T-B system containing Pr and a boundary alloy. Disclosed also is a manufacturing method of the rare earth magnet alloy flake by a strip casting method with improved rotating rollers such that the alloy flake has a specified fine surface roughness and has a small and regulated amount of fine R-rich phase regions. Consequently, the alloy flake for the rare earth magnet does non contain alpha-Fe and has a homogeneous morphology so that the rare earth magnet formed by sintering or bonding the alloy flakes exhibits excellent magnetic properties. |
申请公布号 |
WO03052778(A8) |
申请公布日期 |
2003.09.04 |
申请号 |
WO2002JP13231 |
申请日期 |
2002.12.18 |
申请人 |
SHOWA DENKO K.K.;SASAKI, SHIRO |
发明人 |
SASAKI, SHIRO |
分类号 |
B22F1/00;B22F9/02;B22F9/10;C22C1/04;C22C38/00;C22C38/10;H01F1/057;(IPC1-7):H01F1/04;B22F9/08;B22F9/04;B22D11/06;H01F1/08 |
主分类号 |
B22F1/00 |
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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