METHOD FOR PRODUCING A RARE EARTH SINTERED MAGNET

摘要

Provided is a method for producing a rare earth sintered magnet using granules having excellent fluidity, which cannot only improve dimensional accuracy of a compact, but also improves productivity, without causing properties to dramatically drop. The method comprises the steps of charging a rare earth sintered magnet raw material powder and a granulation aid into a chamber, the raw material powder being agglomerated through contact with the granulation aid by rotating a main blade provided in the chamber relative to the chamber, and the resulting agglomerate being loosened by an auxiliary blade provided in the chamber for producing the granules; charging the granules into a die cavity; obtaining a compacted body by applying a magnetic field to the granules and compressing the granules; and sintering the compacted body.