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METHOD FOR MANUFACTURING RARE EARTH MAGNET 发明申请

2023-03-04 4450 250K 0

专利信息

申请日期 2025-07-14 申请号 JP2012006165
公开(公告)号 JP2013145832A 公开(公告)日 2013-07-25
公开国别 JP 申请人省市代码 全国
申请人 TOYOTA MOTOR CORP
简介 PROBLEM TO BE SOLVED : To provide a method for manufacturing a rare earth magnet, capable of manufacturing a rare earth magnet excellent in squareness and high in maximum energy product. SOLUTION : A method for manufacturing a rare earth magnet includes : a first step of obtaining selected magnetic powder Q by removing magnetic powder having a particle size of less than 50 μm among magnetic powder comprising a main phase of an RE-T-B system (RE represents at least one of Nd, Pr and Y, and T represents Fe or one obtained by substituting a part of Fe with Co) and a grain boundary phase around the main phase, mixing modified alloy powder T comprising an RE-M alloy (M represents a transition metal element or a typical metal element, and RE may comprise RE1-RE2 where RE1 and RE2 represent at least one of Nd, Pr and Y) having a melting point of 700°C or below with the selected magnetic powder Q, and performing hot press working to manufacture a compact S; and a second step of subjecting the compact S to a hot plasticity processing to manufacture a rare earth magnet C. COPYRIGHT : (C)2013, JPO&INPIT


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