Patent ID: 8951371
Filing Date: 2015-02-10
Classification: C22C

Abstract:
1. A method of producing a copper alloy comprising the sequential steps of: casting a copper alloy, which comprises Ni and Si, into an ingot; reheating the ingot of the copper alloy at a temperature rising rate of 20 to 200 ° C/hr; hot rolling the reheated ingot of the copper alloy at 850 to 1,050 ° C. for 0.5 to 5 hours; quenching the hot-rolled copper alloy, after the hot-rolling at a finished temperature of 300 to 700 ° C.; cold rolling the quenched copper alloy, subjecting the cold-rolled copper alloy to solution treatment, quenching the solution-treated copper alloy, subjecting the quenched copper alloy to aging treatment, and then cold rolling the aged copper alloy, the alloy comprising: a precipitate X composed of Ni and Si; and a precipitate Y composed of one of wherein the precipitate X has a grain size of 0.001 to 0.1 μm, the precipitate Y has a grain size of 0.01 to 1 μm, and the precipitate Y has a melting point higher than a solution treatment temperature.