- 专利标题: Method for producing rare-earth magnet
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申请号: US15841681申请日: 2017-12-14
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公开(公告)号: US10546688B2公开(公告)日: 2020-01-28
- 发明人: Daisuke Ichigozaki , Takeshi Yamamoto
- 申请人: TOYOTA JIDOSHA KABUSHIKI KAISHA
- 申请人地址: JP Toyota-shi, Aichi-ken
- 专利权人: TOYOTA JIDOSHA KABUSHIKI KAISHA
- 当前专利权人: TOYOTA JIDOSHA KABUSHIKI KAISHA
- 当前专利权人地址: JP Toyota-shi, Aichi-ken
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2016-253697 20161227
- 主分类号: H01F41/02
- IPC分类号: H01F41/02 ; B22F3/16
摘要:
Provided is a method for producing a rare-earth magnet that can resolve a problem of deterioration of the residual magnetization and coercive force of the rare-earth magnet due to spring-back in producing the rare-earth magnet through performing hot deformation processing of upsetting on a sintered body. The method includes a first step of producing the sintered body through press-forming of magnetic powder for a rare-earth magnet, and a second step of producing a rare-earth magnet precursor through hot deformation processing of upsetting in which the sintered body is placed within a plastic processing mold and is pressurized in a predetermined direction so as to impart magnetic anisotropy to the sintered body, and performing cooling of the rare-earth magnet precursor while a predetermined pressure is kept being applied thereto in the predetermined direction, so that the rare-earth magnet is produced.
公开/授权文献
- US20180182542A1 METHOD FOR PRODUCING RARE-EARTH MAGNET 公开/授权日:2018-06-28
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