Invention Grant
- Patent Title: Method of production rare-earth magnet
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Application No.: US14781425Application Date: 2014-03-31
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Publication No.: US09847169B2Publication Date: 2017-12-19
- Inventor: Akira Kano , Dai Kobuchi , Eisuke Hoshina , Osamu Yamashita , Noritaka Miyamoto
- Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Applicant Address: JP Toyota-shi, Aichi-ken
- Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee Address: JP Toyota-shi, Aichi-ken
- Agency: Sughrue Mion, PLLC
- Priority: JP2013-076056 20130401
- International Application: PCT/IB2014/000450 WO 20140331
- International Announcement: WO2014/162189 WO 20141009
- Main IPC: C22C33/02
- IPC: C22C33/02 ; B22F3/02 ; H01F41/02 ; H01F1/057 ; C21D6/00 ; C21D8/00 ; C21D8/12 ; C22C38/00 ; C22C38/10

Abstract:
A production method includes producing a rare-earth magnet precursor (S′) by performing first hot working in which, in two side surfaces of a sintered body, which are parallel to a pressing direction and are opposite to each other, one side surface is brought to a constrained state to suppress deformation, and the other side surface is brought to an unconstrained state to permit deformation; and producing a rare-earth magnet by performing second hot working in which, in two side surfaces (S′1, S′2) of the rare-earth magnet precursor (S′), which are parallel to the pressing direction, a side surface (S′2), which is in the unconstrained state in the first hot working, is brought to the constrained state to suppress deformation, and a side surface (S′1), which is in the constrained state in the first hot working, is brought to the unconstrained state to permit deformation.
Public/Granted literature
- US20160055968A1 METHOD OF PRODUCTION RARE-EARTH MAGNET Public/Granted day:2016-02-25
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