Rare-earth magnet production method
2022-06-06
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1635K
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A method for manufacturing a rare-earth magnet, through hot deformation processing, having a high degree of orientation at the entire area thereof and high remanence, without increasing processing cost including 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.