METHOD OF MANUFACTURING FORGED PRODUCT, FORGING APPARATUS, AND FORGING STOCK

摘要

PROBLEM TO BE SOLVED: To improve the plastic flow condition of a material in forging, to suppress the generation of piping, and to stably provide stamp forgings of excellent appearance.;SOLUTION: A method of manufacturing an aluminum alloy forged product is characterized as follows. In the method of manufacturing the aluminum alloy forged product having a top surface including a recessed part and a thick wall part on the other side surface, a die in which a die that molds the outline of the thick wall part and a die that molds the top surface including the recessed part are combined is used, and the forging stock in which the coating amount of the graphite solid content of a graphite-based water-soluble lubricant of the surface that becomes the top surface including the recessed part is at most 0.027 mg/mm² and is smaller than the coating amount of the other side of the surface including the recessed part, is performed with plasticity flow to form the thick wall part.;COPYRIGHT: (C)2013,JPO&INPIT