Copper alloy casting excellent in machinability, strength, wear resistance and corrosion resistance and casting method thereof

摘要

0.5-15 mass% Sn, 0.001-0.049 mass% Zr, 0.01-0.35 mass% P, 0.01-15 mass% Pb, 0.01-15 mass% Bi, consisting of one or more elements selected from 0.01 to 1.2 mass% Se and 0.05 to 1.2 mass% Te, and the balance of Cu and 73 mass% or more, f1 = [ P] / [Zr] = 0.5-100, f2 = 3 [Sn] / [Zr] = 300-15000 and f3 = 3 [Sn] / [P] = 40-2500 (the content of the element a is [ a) mass%), the total content of α phase, γ phase and δ phase is 95% or more by area ratio, and the average crystal grain size in the macro structure at the time of melt solidification is 300 μm or less. Copper alloy with excellent machinability, strength, wear resistance and corrosion resistance Thing.