| 摘要 |
PURPOSE: To produce a raw material alloy for producing a rare earth magnet powder capable of producing rare earth magnet powder only by dehydrogenating treatment and to provide a method for producing the same. CONSTITUTION: (1) This is the raw material alloy for producing rare earth magnet powder in which, in each alloy matrix of an alloy composed of R (rare earth elements including Y) and T (transition metals) or an alloy composed of R, T and M (one or >= two kinds among Si, Ga, Zr, Nb, Mo, Hf, Ta, W, Al, Ti and V), the hydrides of R with a bar shape having 0.002 to 20μm average thickness are at least dispersed. (2) This is the method for producing a raw material alloy for producing rare earth magnet powder in which an alloy composed of R and T or an alloy composed of R, T and M is held to 500 to 750 deg.C mainly in a hydrogen atmoshere, is subjected to hydrogen occluding treatment, is thereafter held to a temp. of 100 to 600 deg.C relatively lower than the same treating temp. and is successively cooled to a room temp. |
