METHOD FOR PRODUCING FUNCTIONALLY GRADIENT MATERIAL BY USING BOTH SINTERING METHOD AND CASTING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a functionally gradient material in which a base metal and very fine particles of reinforcing material are integrally molded by using both sintering method and casting method.SOLUTION: A compact is produced by mixing base metal powders with very fine particle powders of reinforcing material to produce mixed powders of them, and by performing centrifugal sintering after injecting the mixed powders into a cylindrically-shaped die. A functionally gradient material in which the base metal and the very fine particles of reinforcing material are integrally molded is produced by putting the produced compact into a casting mold after being pulled out of the cylindrically-shaped die, and by casting the melted base metal which is melted in a melting furnace for casting into the casting mold. Alternatively, the compact is produced by mixing the base metal powders with the very fine particle powders of reinforcing material to produce the mixed powders of them, and by performing centrifugal sintering after injecting the mixed powders into the cylindrically-shaped die. The functionally gradient material in which the base metal and the very fine particles of reinforcing material are integrally molded is produced by casting the melted base metal which is melted in the melting furnace for casting into the cylindrically-shaped die.