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C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22C—ALLOYS
C22C33/00—Making ferrous alloys
C22C33/02—Making ferrous alloys by powder metallurgy
B—PERFORMING OPERATIONS; TRANSPORTING
B22—CASTING; POWDER METALLURGY
B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
B22F9/00—Making metallic powder or suspensions thereof
B22F9/02—Making metallic powder or suspensions thereof using physical processes
B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling