| 简介 |
PROBLEM TO BE SOLVED : To provide a method of manufacturing an oriented magnet by which an oxide film and the like on a surface of a compact before hot plastically worked can be effectively removed, and good lubricity between the compact and a molding mold in the subsequent hot plastic working can be assured, and to provide a method of manufacturing a rare-earth magnet using the oriented magnet obtained by the above method.
SOLUTION : The method of manufacturing the oriented magnet comprises : a step of immersing a compact S obtained by press-molding powder that is to be a magnet material in molten glass L, and performing electrolytic polishing of a surface of the compact S by energizing a circuit F including a power supply to which the compact S that is to be an anode and a cathode member G arranged in the molten glass L are connected; and a step of housing in the molding mold a hot plastic working precursor consisting of the electrolytically-polished compact S on whose surface the molten glass is adhered, and performing hot plastic working on the precursor to manufacture an oriented magnet C in which magnetic anisotropy is given to the hot plastic working precursor.
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