Copper alloy
AssigneeMitsubishi Shindoh Co., Ltd.
InventorKeiichiro Oishi
Life of this patent
Estimating the term…
Abstract
A copper alloy consists essentially of Cu: 69 to 88 mass %, Si: 2 to 5 mass %, Zr: 0.0005 to 0.04 mass %, P: 0.01 to 0.25 mass %, and Zn: balance; has relation of, in terms of content of element a, [a] mass %, f0=[Cu]−3.5[Si]−3[P]=61 to 71, f1=[P]/[Zr]=0.7 to 200, f2=[Si]/[Zr]=75 to 5000, and f3=[Si]/[P]=12 to 240; has a metal structure containing α phase and, K phase and/or γ phase, and has relation of, in terms of a content of phase b, [b]%, in an area rate, f4=[α]+[γ]+[K]≧85 and f5=[γ]+[K]+0.3[μ]−[β]=5 to 95; and has an average grain diameter of 200 μm or less in a macrostructure when melted and solidified.
Claims140
A casted copper alloy,
- consisting essentially of Cu:
- 69 to 88 mass %, Si:
- 2 to 5 mass %, Zr:
- 0.0005 to 0.04 mass %, P:
- 0.01 to 0.25 mass %, and Zn:
- the balance;
- having relation of, in terms of a content of an element a, [a] mass %, f0=[Cu]−3.5[Si]−3[P]=61 to 71, f1=[P]/[Zr]=0.7 to 200, f2=[Si]/[Zr]=75 to 5000, and f3=[Si]/[P]=12 to 240;
- wherein the copper alloy has a metal structure that contains α phase and one or more additional phases selected from the group consisting of (i) K phase, (ii) γ phase, (iii) K phase and γ phase, (iv) β phase, and (v) μ phase, and having relation of, in terms of a content of a phase b, [b]%, in an area rate, f4=[α]+[γ]+[K]≧85 and f5=[γ]+[K]+0.3[μ]−[β]=5 to 95;
- and
- the copper alloy has an average grain diameter of 200 μm or less in a macrostructure obtained when melted and solidified during casting.
A casted copper alloy,
- consisting essentially of Cu:
- 69 to 88 mass %, Si:
- 2 to 5 mass %, Zr:
- 0.0005 to 0.04 mass %, P:
- 0.01 to 0.25 mass %, and Zn:
- the balance;
- having relation of, in terms of a content of an element a, [a] mass %, f0=[Cu]−3.5[Si]−3[P]=61 to 71, f1=[P]/[Zr]=0.7 to 200, f2=[Si]/[Zr]=75 to 5000, and f3=[Si]/[P]=12 to 240;
- wherein the copper alloy has a metal structure that contains α phase and one or more additional phases selected from the group consisting of (i) K phase, (ii) γ phase, (iii) K phase and γ phase, (iv) β phase, and (v) μ phase, and having relation of, in terms of a content of a phase b, [b]%, in an area rate, f4=[α]+[γ]30 [K]≧85 and f5=[γ]+[K]+0.3[μ]−[β]=5 to 95;
- and
- the copper alloy has an average grain diameter of 200 μm or less in a macrostructure obtained when melted and solidified during casting, wherein, when melted and solidified during casting, a peritectic reaction is generated.
A casted copper alloy,
- consisting essentially of Cu:
- 69 to 88 mass %, Si:
- 2 to 5 mass %, Zr:
- 0.0005 to 0.04 mass %, P:
- 0.01 to 0.25 mass%, and Zn:
- the balance;
- having relation of, in terms of a content of an element a, [a] mass %, f0=[Cu]−3.5[Si]−3[P]=61 to 71, f1=[P]/[Zr]=0.7 to 200, f2=[Si]/[Zr]=75 to 5000, and f3=[Si]/[P]=12 to 240;
- wherein the copper alloy has a metal structure that contains a phase and one or more additional phases selected from the group consisting of (i) K phase, (ii) γ phase, (iii) K phase and γ phase, (iv) β phase, and (v) μ phase, and having relation of, in terms of a content of a phase b, [b]%, in an area rate, f4=[α]+[γ]+[K] ≧85 and f5=[γ]+[K]+0.3[μ]−[β]=5 to 95;
- and
- the copper alloy has an average grain diameter of 200 μm or less in a macrostructure obtained when melted and solidified during casting, wherein the copper alloy is provided when a cooling rate in the melt-solidification of casting has a range from 10−2 to 104° C/sec, when casting starts at 20 to 250° C. higher than a liquidus temperature of the copper alloy or below 1150° C., and when Zr is added in a form of Cu-Zr alloy or Cu-Zn-Zr alloy, before casting.
Dependencies are inferred from the claim text.