摘要:
An advantage of the invention is to provide a master alloy used in a casting of a modified copper alloy, grains of which can be refined during a melt-solidification, and also a method of casting a modified copper alloy using the same.In order to achieve the advantage, master alloy for casting a copper alloy in a form of Cu: 40 to 80%, Zr: 0.5 to 35% and the balance of Zn; and Cu: 40 to 80%, Zr: 0.5 to 35%, P: 0.01 to 3% and the balance of Zn are used, and thus grain-refined copper alloy casting products are obtained.
摘要:
Disclosed is a copper alloy. The 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 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; has a metal structure that contains α phase and, K phase and/or γ phase, and has 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 has an average grain diameter of 200 μm or less in a macrostructure when melted and solidified.
摘要:
The present invention discloses a heat resistance copper alloy material characterized in that said copper alloy material comprises 0.15 to 0.33 mass percent of Co, 0.041 to 0.089 mass percent of P, 0.02 to 0.25 mass percent of Sn, 0.01 to 0.40 mass percent of Zn and the remaining mass percent of Cu and inevitable impurities, wherein each content of Co, P, Sn and Zn satisfies the relationships 2.4≦([Co]−0.02)/[P]≦5.2 and 0.20≦[Co]+0.5[P]+0.9[Sn]+0.1[Zn]≦0.54, wherein [Co], [P], [Sn] and [Zn] are said mass percents of Co, P, Sn and Zn content, respectively; and said copper alloy material is a pipe, plate, bar, wire or worked material obtained by working said pipe, plate, bar or wire material into predetermined shapes.
摘要:
The free-cutting copper alloy according to the present invention contains a greatly reduced amount of lead in comparison with conventional free-cutting copper alloys, but provides industrially satisfactory machinability. The free-cutting alloys comprise 69 to 79 percent, by weight, of copper, 2.0 to 4.0 percent, by weight, of silicon, 0.02 to 0.4 percent, by weight, of lead, and the remaining percent, by weight, of zinc.
摘要:
The free-cutting copper alloy according to the present invention contains a greatly reduced amount of lead in comparison with conventional free-cutting copper alloys, but provides industrially satisfactory machinability. The free-cutting alloys comprise 69 to 79 percent, by weight, of copper, 2.0 to 4.0 percent, by weight, of silicon, 0.02 to 0.4, by weight, of lead, and the remaining percent, by weight, of zinc.
摘要:
Copper alloy casting contains Cu: 58-72.5 mass %; Zr: 0.0008-0.045 mass %; P: 0.01-0.25 mass %; one or more elements selected from Pb: 0.01-4 mass %, Bi: 0.01-3 mass %, Se: 0.03-1 mass %, and Te: 0.05-1.2 mass %; and Zn: a remainder, wherein [Cu]−3[P]+0.5([Pb]+[Bi]+[Se]+[Te])=60-90, [P]/[Zr]=0.5-120, and 0.05[γ]+([Pb]+[Bi]+[Se]+[Te])=0.45-4 (the content of an element ‘a’ is denoted as [a] mass %; the content of γ phase is denoted as [γ]% by area ratio; and an element ‘a’ that is not contained is denoted as [a]=0). The total content of α phase and γ phase is 85% or more, γ phase content is 25% or less by area ratio, and mean grain size in the macrostructure during melt-solidification is 250 μm or less.
摘要:
In a high-strength and high-electrical conductivity copper alloy rolled sheet, 0.14 to 0.34 mass % of Co, 0.046 to 0.098 mass % of P, 0.005 to 1.4 mass % of Sn are contained, [Co] mass % representing a Co content and [P] mass % representing a P content satisfy the relationship of 3.0≦([Co]−0.007)/([P]−0.009)≦5.9, a total cold rolling ratio is equal to or greater than 70%, a recrystallization ratio is equal to or less than 45% a an average grain size of recrystallized grains is in the range of 0.7 to 7 μm, an average grain diameter of precipitates is in the range of 2.0 to 11 nm, and an average grain size of fine crystals is in the range of 0.3 to 4 μm. By the precipitates of Co and P, the solid solution of Sn, and fine crystals, the strength, conductivity and ductility of the copper alloy rolled sheet are improved.
摘要:
A high-strength and high-electrical conductivity copper alloy rolled sheet has an alloy composition containing 0.14 to 0.34 mass % of Co, 0.046 to 0.098 mass % of P, 0.005 to 1.4 mass % of Sn and the balance including Cu and inevitable impurities, wherein [Co] mass % representing a Co content and [P] mass % representing a P content satisfy the relationship of 3.0≦([Co]−0.007)/([P]−0.009)≦5.9. In a metal structure, precipitates are formed, the shape of the precipitates is substantially circular or elliptical, the precipitates have an average grain diameter of 1.5 to 9.0 nm, or 90% or more of all the precipitates have a diameter of 15 nm or less to be fine precipitates, and the precipitates are uniformly dispersed. With the precipitation of the fine precipitates of Co and P and the solid-solution of Sn, the strength, conductivity and heat resistance are improved and a reduction in costs is realized.
摘要:
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.
摘要:
A high strength and high thermal conductivity copper alloy tube contains: Co of 0.12 to 0.32 mass %; P of 0.042 to 0.095 mass %; and Sn of 0.005 to 0.30 mass %, wherein a relationship of 3.0≦([Co]−0.007)/([P]−0.008)≦6.2 is satisfied between a content [Co] mass % of Co and a content [P] mass % of P, and the remainder includes Cu and inevitable impurities. Even when a temperature is increased by heat generated by a drawing process, a recrystallization temperature is increased by uniform precipitation of a compound of Co and P and by solid-solution of Sn. Thus, the generation of recrystallization nucleuses is delayed, thereby improving heat resistance and pressure resistance of the high strength and high thermal conductivity copper alloy tube.