PRODUCING POWDER METALLURGICAL PARTS USING THERMALLY DEGRADABLE MOLDS

摘要

SPECIFICATIONRoger L. RuecklPRODUCTION OF POWDER METALLURGICALPARTS BY FORMATION OF SINTERED PREFORMSIN THERMALLY DEGRADABLE MOLDSABSTRACT OF THE DISCLOSUREMetal particles are intimately mixed with at leastabout 1.5 wt. percent of an organic binder, the mixture is pouredinto a thermally degradable mold and heated to above sinteringtemperature to form a preform useful for hot forging. The moldprovides integrity for the packed particles until the organiccompounds carbonize, which in turn effect sufficient bonding untilthe particles actually sinter together,