COPPER INGOT FOR Bi-Se ADDITION, METHOD FOR MANUFACTURING COPPER-BASE ALLOY USING IT, COPPER-BASE ALLOY, AND INGOT AND PRODUCT USING THE ALLOY

摘要

PROBLEM TO BE SOLVED: To provide the following, with respect to a copper-base alloy suitably used as a material for liquid contact parts, such as valve and faucet, building materials, electrical and machine parts, marine parts, apparatus related to hot water, etc.: a copper ingot for Bi-Se addition by which the yield of Bi and Se can be improved and casting defects can be suppressed; a method for manufacturing a copper-base alloy using the copper ingot; the copper-base alloy; and an ingot and a product using the alloy.;SOLUTION: In this method for manufacturing the copper-base alloy, the copper ingot for Bi-Se addition prepared by finely dispersing a Bi-Se master alloy in a copper alloy having ≤21.9 mass% Zn content is melted, and this ingot is melted together with a copper-alloy material. By this procedure, Bi and Se can be finely dispersed in the copper-alloy material and their yield can be improved and also casting defects can be suppressed.;COPYRIGHT: (C)2006,JPO&NCIPI