PURPOSE: To remove the oxides of Cr, etc., inevitably contained in the Cr-base metal refined in the air, in the couse of mechanical alloying treatment, at the time of producing an alloy powder in which fine Y2O3 is uniformly dispersed in the matrix of the Cr-base metal.

CONSTITUTION: A powder of Cr-base metal refined in the air and Y powder are introduced into an attritor charged with steel balls, and these powders are vigorously agitated together with the steel balls under an inert gas atmosphere and finely crushed. Y grains are incorporated into the grains of Cr-base metal, and the oxides in the composition of the Cr-base metal are reduced by Y and Y is changed into Y2O3. These crushing, solid phase infiltration, and redox reaction are repeated by means of sufficient agitation.