Patent ID: 9328401
Filing Date: 2016-05-03
CPC Classification: A61P,B22D,C22C,C22F

Claim Text:
1. A copper alloy casting comprising a copper alloy comprising: Sn: 0.5 to 15 mass %; Zr: 0.001 to 0.049 mass %; P: 0.01 to 0.35 mass %; one or more elements selected from Zn: 0.27 to 12.59 mass %; and Cu: 73 mass % or more serving as a remainder, wherein the copper alloy of the copper alloy casting satisfies the following conditions, f1=[P]/[Zr]=0.5 to 100, f2=([Zn]+3[Sn])/[Zr]=300 to 15000, f3=([Zn]+3[Sn])/[P]=40 to 2500, and f4=[Zn]+3[Sn]=10 to 43, and the content of each element ‘a’ is expressed as mass % wherein the total content of α, γ and δ-phases of the copper alloy in the copper alloy casting in a solid metal state is 95% or more, wherein the copper alloy has grains with a mean grain size of 300 μm or less of the copper alloy casting.