Patent ID: 7172665
Filing Date: 2007-02-06
Classification: C22C,C22F

Abstract:
1. A method of manufacturing a high strength and high thermal conductive forged article, comprising a first step of melting a high strength and high thermal conductive Cu-based alloy comprising at least 2 to 6% by weight of Ag and 0.5 to 0.9% by weight of Cr; a second step of solidifying the molten alloy obtained in the first step by casting; a third step of subjecting the solidified article obtained in the second step to a homogenizing heat treatment which substantively eliminates segregation of alloying elements in the solidified article by heating during a predetermined time at a temperature within a range from 780 to 950° C.; a fourth step of subjecting the heat-treated article obtained in the third step in which diffusion of the alloying elements occurs and segregation of the alloying elements has been eliminated by the third step, to hot working by forging or rolling at a temperature within a range from 750 to 950° C.; a fifth step of subjecting the hot-worked article obtained in the fourth step to a solution treatment at a temperature within a range from 750 to 980° C.; a sixth step of subjecting the heat-treated article obtained in the fifth step to at least 5% cold working or warm working at a temperature equal to or lower than 500° C. by forging or rolling; and a seventh step of subjecting the formed article obtained in the sixth step to an aging treatment at a temperature within a range from 370 to 500° C. for 0.1 hours or more.