C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22C—ALLOYS
C22C1/00—Making non-ferrous alloys
C22C1/04—Making non-ferrous alloys by powder metallurgy
C22C1/05—Mixtures of metal powder with non-metallic powder
C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
Procede pour fabriquer au moins la couche d'usure de parties frittees soumises a des contraintes elevees, destinees en particulier a la distribution des soupapes d'une machine a combustion interne.