Copper alloy and copper alloy manufacturing method

Abstract

A method of manufacturing a copper alloy is provided, including melting and casting a copper alloy having a composition expressed, in atomic percent, by a formula of Cu100−(a+b)ZraBb, wherein 1.0≦a≦8.0, 0≦b≦4.0, and a+b≦8.0, by a nonrefractory melting method. A cold working with a reduction of about 50% or more for the copper alloy without a solution treatment is performed to provide the copper alloy a dual phase structure having a layered structure including a Cu matrix phase having a plurality of grain particles having an average diameter of about 10 μm or less, and an eutectic phase around the Cu matrix phase. At least part of each grain particle contacts another grain particle within the eutectic phase, and the eutectic phase includes at least one of a Cu—Zr compound and a Cu—Zr—B compound.

Dependencies are inferred from the claim text.