PRODUCTION OF COPPER-INFILTRATED FERROUS SINTERED ALLOY MEMBER

摘要

PURPOSE:To obtain the titled member having a smooth and beautiful finish surface without pitting holes and deposit on the surface by subjecting the copper- infiltrating surface of a ferrous sintered body to a mechanical sealing treatment prior to a copper infiltration treatment of the sintered body. CONSTITUTION:A metallic powder mixture composed essentially of iron or alloy powder mixture or the powder mixture composed thereof is molded to a green compact and is then sintered or hot pressed in a vacuum or inert atmosphere, by which the sintered body is obtd. The sintered body is subjected to shot blasting, sand blasting, etc. and at least the copper-infiltrating surface is subjected to the mechanical sealing treatment. The sintered body is subjected to the copper infiltration treatment in succession thereto, by which the copper-infiltrated ferrous sintered alloy member is obtd.