发明名称 |
Method and apparatus for producing compact of rare earth alloy powder and rare earth magnet |
摘要 |
A method for producing a compact of rare earth alloy powder of the present invention includes: a powder-filling step of filling rare earth allow powder in a cavity formed by inserting a lower punch into a through hall of a die of a powder compacting machine; and a compression step of pressing the rare earth alloy powder while applying a magnetic field, the steps being repeated a plurality of times. When the (n+1)th (n is an integer equal to or more than 1) stage compression step is to be carried out, the top surface of a compact produced in the n-th stage compression step is placed at a position above the bottom surface of a magnetic portion of a die.
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申请公布号 |
US2002153061(A1) |
申请公布日期 |
2002.10.24 |
申请号 |
US20020166250 |
申请日期 |
2002.06.11 |
申请人 |
SUMITOMO SPECIAL METALS CO., LTD. |
发明人 |
HARADA TSUTOMU;MORIMOTO HITOSHI;TANAKA ATSUO |
分类号 |
B22F3/02;B22F3/03;H01F1/057;H01F41/02;(IPC1-7):H01F1/053 |
主分类号 |
B22F3/02 |
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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