PRODUCTION OF SINTERED ALUMINUM ALLOY PARTS

PURPOSE:To improve productivity and to assure good material characteristics by passing plural times a billet obtd. by subjecting quickly cooled and solidified powder of an Al alloy to a heating treatment, pressure molding and sintering between rolls at a sintering temp. CONSTITUTION:The quickly cooled and solidified powder P of the Al alloy is supplied into a heater 30 in a chamber 10 in which an inert atmosphere is maintained. The powder P subjected to the heating treatment is taken out of the chamber 10 into the atm and is molded by a pressure molding device 51 of a sintering device 50. The molding is molded and sintered to the billet of a prescribed shape and size by a hot hydrostatic pressurizing and sintering device 54. The billet is then supplied to a hot rolling device 60 by which the billet is rolled. Relatively uniform compressive and shearing forces are exerted over the entire part of the billet by such working, by which the oxide films on the powder P surface are broken down in accompanying the deformation. The sintering of the powder to each other progresses. The thoroughly sintered and defectless sintered parts are thus efficiently obtd.