发明名称 |
PRODUCTION METHOD OF RARE EARTH SINTERED MAGNET AND PRODUCTION DEVICE USED IN THE PRODUCTION METHOD |
摘要 |
There is provided a production method and a production device for producing each of the rare earth sintered magnet sintered bodies without carrying a mold in a sintering furnace. The method includes feeding an alloy powder into a mold having side walls divided into two or more sections; filling the alloy powder into the mold to prepare a filled molded-body; orienting the alloy powder in the filled molded-body by applying a magnetic field to the filled molded-body to prepare an oriented filled-molded-body; detaching the side walls of the mold from the oriented filled-molded-body and retrieving the oriented filled-molded-body from the mold; and sintering the retrieved oriented filled-molded-body. The filling step and the orienting step are performed at different locations. A pulsed magnetic field can be applied in the orienting step and inside of the mold can be partitioned into a plurality of cavities by partitions. |
申请公布号 |
US2016293306(A1) |
申请公布日期 |
2016.10.06 |
申请号 |
US201514893707 |
申请日期 |
2015.09.18 |
申请人 |
NDFEB CORPORATION |
发明人 |
Sagawa Masato;Hayashi Shinichi |
分类号 |
H01F1/057;B22F3/00;B22F3/10;C22C38/00;H01F1/055;C22C38/16;C22C38/10;C22C38/06;B22F1/00;B22F9/04 |
主分类号 |
H01F1/057 |
代理机构 |
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代理人 |
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主权项 |
1. A method for producing a magnetic anisotropic rare earth sintered magnet comprising:
a powder feeding step of feeding an alloy powder into a mold having side walls divided into two or more sections; a filling step of filling the alloy powder into the mold to prepare a filled molded-body; an orienting step of orienting the alloy powder in the filled molded-body by applying a magnetic field to the filled molded-body to prepare an oriented filled-molded-body; a retrieving step of detaching the side walls of the mold from the oriented filled-molded-body and retrieving the oriented filled-molded-body from the mold; and a sintering step of sintering the retrieved oriented filled-molded-body, wherein the filling step and the orienting step are performed at different locations. |
地址 |
Kyoto-shi, Kyoto JP |