Copper alloy casting having excellent machinability, strength, wear resistance and corrosion resistance and method of casting the same
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United States of America Patent
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May 3, 2016
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Aug 10, 2005
filing date -
Aug 10, 2004
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A copper alloy casting with excellent machinability, strength, wear resistance and corrosion resistance contains 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 Pb: 0.01 to 15 mass %, Bi: 0.01 to 15 mass %, Se: 0.01 to 1.2 mass %, and Te: 0.05 to 1.2 mass %; and Cu: 73 mass % or more serving as a remainder. In this case, f1=[P]/[Zr]=0.5 to 100, f2=3[Sn]/[Zr]=300 to 15000, and f3=3[Sn]/[P]=40 to 2500 (the content of an element ‘a’ is expressed as [a] mass %). The total content of α, γ and δ-phases is 95% or more, and the mean grain size is 300 μm or less.
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