发明名称 |
METHOD FOR PRODUCING R-T-B SINTERED MAGNET |
摘要 |
A method for producing a sintered R-T-B based magnet includes the steps of: providing R-T-B based alloy powders A and B so that the R-T-B based alloy powder B has a particle size D50 that is smaller by at least 1.0 µm than that of the R-T-B based alloy powder A and that there is a difference ”RH, of at least 4 mass% between the higher content of a heavy rare-earth element RH in the R-T-B based alloy powder B and the lower content of the heavy rare-earth element RH in the R-T-B based alloy powder A; mixing these two R-T-B based alloy powders A and B together; compacting the mixed R-T-B based alloy powder to obtain a compact with a predetermined shape; and sintering the compact. |
申请公布号 |
EP2388350(A1) |
申请公布日期 |
2011.11.23 |
申请号 |
EP20100731161 |
申请日期 |
2010.01.14 |
申请人 |
HITACHI METALS, LTD. |
发明人 |
ISHII, RINTARO;KUNIYOSHI, FUTOSHI |
分类号 |
C22C33/02;B22F1/00;B22F3/00;B22F9/04;C22C38/00;H01F1/08;H01F41/02 |
主分类号 |
C22C33/02 |
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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