PRODUCTION OF ABRASION-RESISTANT COMPOSITE ALUMINUM MEMBER OF CYLINDRICAL SHAPE

摘要

PURPOSE:To provide extremely high abrasion resistance on the inside circumferential surface and to maintain machinability on the outside circumferential part by fluidizing the state in solid-liquid coexistence of abrasion resistant powder and an Al alloy in a molding die by the insertion of a plunger die thereby molding the same into a cylindrical shape. CONSTITUTION:An Al alloy and a powdery abrasion-resitant material are agitated at the temp. region in solid-liquid co-existence of the Al alloy, and the half melt thereof is supplied into a molding die 1. Immediately thereafter a plunger die 4 is inserted into the hole 2 of the die 1 and the half melt is molded to a cylindrical shape under pescribed pressure. Thus on account of the effect of the abrasion-resistant dissimilar material existing preferentially on the inside circumferential surface, the part near said inside circumferential surface has extremely high abrasion resistance.