COPPER ALLOY AND METHOD FOR PRODUCING COPPER ALLOY
Provided is a copper alloy, which has a composition, by at%, represented by the composition formula Cu100-a-b-c(Zr,Hf)a(Cr,Ni,Mn,Ta)b(Ti,Al)c [where 2.5?a?4.0, 0.1<b?1.5, 0?c?0.2, (Zr,Hf) is one or two of Zr and Hf, (Cr,Ni,Mn,Ta) is one, two or more of Cr, Ni, Mn, and Ta, (Ti,Al) is one or two of Ti and Al]
has a Cu primary crystal wherein the average secondary dendrite arm interval is 2 [mu]m or less
has a eutectic matrix having a lamellar interval of 0.2 [mu]m or less that is formed from a quasistable Cu5(Zr,Hf) compound phase and a Cu phase
and has high strength and high conductivity, as well as good bendability. Also provided is a method for producing a copper alloy.