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.