发明名称 |
RARE-EARTH-MAGNET PRODUCTION METHOD |
摘要 |
Provided is a method for manufacturing a rare-earth magnet through hot deformation processing, capable of manufacturing a rare-earth magnet having high degree of orientation at the entire area of the rare-earth magnet manufactured and high remanence, without increasing processing cost therefor. A method includes: a step of press-forming powder as a rare-earth magnetic material to form a compact S; and a step of performing hot deformation processing to the compact S, thus manufacturing the rare-earth magnet C. The hot deformation processing includes two steps of extruding and upsetting. The extruding is to place a compact S in a die Da, and apply pressure to the compact S' in a heated state with an extrusion punch PD so as to reduce the thickness for extrusion to prepare the rare-earth magnet intermediary body S" having a sheet form, and the upsetting is to apply pressure to the rare-earth magnet intermediary body S" in the thickness direction to reduce the thickness, thus manufacturing the rare-earth magnet C. |
申请公布号 |
EP2913831(A4) |
申请公布日期 |
2015.11.25 |
申请号 |
EP20130848858 |
申请日期 |
2013.10.17 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
ICHIGOZAKI, DAISUKE;MIYAMOTO, NORITAKA;SHOJI, TETSUYA;IKEDA, YUYA;MANABE, AKIRA |
分类号 |
H01F41/02;B22F3/17;B22F3/20;C22C28/00;H01F1/057;H01F1/08 |
主分类号 |
H01F41/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|