Sn-CONTAINING COPPER ALLOY AND METHOD OF MANUFACTURING THE SAME

A Sn-containing copper alloy comprising:

• Sn:
• 0.01 to 16 mass %, Zr:
• 0.001 to 0.049 mass %, P:
• 0.01 to 0.25 mass %, Zn:
• 0.01 to 38 mass %, and Cu:
• remainder,
• wherein f0=[Cu]−0.5[Sn]−3[P]=61 to 97, f1=[P]/[Zr]=0.5 to 100, f2=([Zn]+3[Sn])/[Zr]=30 to 15000, f3=([Zn]+3[Sn])/[P]=3 to 2500 and f4=[Zn]+3[Sn]=10 to 48, wherein the content of each element ‘a’ is represented as [a] mass % are satisfied, and wherein
• the α and γ-phases and δ-phase, or the α and γ-phases or δ-phase, are included and the total content of the α and γ-phases and δ-phase, or the α and γ-phases or δ-phase, reaches 90% or more by area ratio, and
• the mean grain size in the macrostructure during the melt-solidification is 300 μm or less.

A Sn-containing copper alloy comprising:

• Sn:
• 0.01 to 16 mass %;
• Zr:
• 0.001 to 0.049 mass %;
• P:
• 0.01 to 0.25 mass %;
• one or more elements selected from Mn:
• 0.05 to 4 mass %, Al:
• 0.01 to 3 mass %, Si:
• 0.01 to 1.9 mass % and Co:
• 0.005 to 0.1 mass %;
• and Cu:
• remainder,
• wherein f0=[Cu]−0.5[Sn]−3[P]+[Mn]−1.8[Al]−3.5[Si]=61 to 97, f1=[P]/[Zr]=0.5 to 100, f2=3[Sn]/[Zr]=30 to 15000, and f3=3[Sn]/[P]=3 to 2500, wherein the content of each element ‘a’ is represented as [a] mass %, and [a] =0 for each element ‘a’ that is not contained in the alloy, are satisfied, and
• the α and γ-phases and δ-phase, or α and γ-phases or δ-phase, are included and the total content of the α and γ-phases and δ-phase, or α and γ-phases or δ-phase, reaches 90% or more by area ratio, and
• the mean grain size in the macrostructure during melt-solidification is 300 μm or less.

A Sn-containing copper alloy comprising:

• Sn:
• 0.01 to 16 mass %;
• Zr:
• 0.001 to 0.049 mass %;
• P:
• 0.01 to 0.25 mass %;
• Zn:
• 0.01 to 38 mass %;
• one or more elements selected from Mn:
• 0.05 to 4 mass %, Al:
• 0.01 to 3 mass %, Si:
• 0.01 to 1.9 mass % and Co:
• 0.005 to 0.1 mass %;
• and Cu:
• remainder,
• wherein f0=[Cu]−0.5[Sn]−3[P]+[Mn]−1.8[Al]−3.5[Si]=61 to 97, f1=[P]/[Zr]=0.5 to 100, f2=([Zn]+3[Sn])/[Zr]=30 to 15000, f3=([Zn]+3[Sn])/[P]=3 to 2500 and f4=[Zn]+3[Sn]=10 to 48, wherein the content of each element ‘a’ is represented as [a] mass %, and [a]=0 for each element ‘a’ that is not contained in the alloy, are satisfied, and
• the α and γ-phases and δ-phase, or α and γ-phases or δ-phase, are included and the total content of the α and γ-phases and δ-phase, or α and γ-phases or δ-phase, reaches 90% or more by area ratio, and
• the mean grain size in the macrostructure during melt-solidification is 300 μm or less.

A Sn-containing copper alloy comprising:

• Sn:
• 0.01 to 16 mass %;
• Zr:
• 0.001 to 0.049 mass %;
• P:
• 0.01 to 0.25 mass %;
• Zn:
• 0.01 to 38 mass %;
• one or more elements selected from As:
• 0.02 to 0.2 mass %, Sb:
• 0.02 to 0.2 mass % and Mg:
• 0.001 to 0.2 mass %;
• and Cu:
• remainder,
• wherein f0=[Cu]−0.5[Sn]−3[P]−0.5([As]+[Sb])+[Mg]+[Mn]−1.8[Al]−3.5[Si]=61 to 97, f1=[P]/[Zr]=0.5 to 100, f2=([Zn]+3[Sn])/[Zr]=30 to 15000, f3=([Zn]+3[Sn])/[P]=3 to 2500 and f4=[Zn]+3[Sn]=10 to 48, wherein the content of each element ‘a’ is represented as [a] mass %, and [a]=0 for each element ‘a’ that is not contained in the alloy, are satisfied, and
• the α and γ-phases and δ-phase, or α and γ-phases or δ-phase, are included and the total content of the α and γ-phases and δ-phase, or α and γ-phases or δ-phase, reaches 90% or more by area ratio, and
• the mean grain size in the macrostructure during melt-solidification is 300 μm or less.

A Sn-containing copper alloy comprising:

• Sn:
• 0.01 to 16 mass %;
• Zr:
• 0.001 to 0.049 mass %;
• P:
• 0.01 to 0.25 mass %;
• Zn:
• 0.01 to 38 mass %;
• one or more elements selected from As:
• 0.02 to 0.2 mass %, Sb:
• 0.02 to 0.2 mass % and Mg:
• 0.001 to 0.2 mass %;
• one or more elements selected from Mn:
• 0.05 to 4 mass %, Al:
• 0.01 to 3 mass %, Si:
• 0.01 to 1.9 mass % and Co:
• 0.005 to 0.1 mass %;
• and Cu:
• remainder,
• wherein f0=[Cu]−0.5[Sn]−3[P]−0.5([As]+[Sb])+[Mg]+[Mn]−1.8[Al]−3.5[Si]=61 to 97, f1=[P]/[Zr]=0.5 to 100, f2=([Zn]+3[Sn])/[Zr]=30 to 15000, f3=([Zn]+3[Sn])/[P]=3 to 2500 and f4=[Zn]+3[Sn]=10 to 48, wherein the content of each element ‘a’ is represented as [a] mass %, and [a]=0 for each element ‘a’ that is not contained in the alloy, are satisfied, and
• the α and γ-phases and δ-phase, or the α and γ-phases or δ-phase, are included and the total content of the α and γ-phases and δ-phase, or the α and γ-phases or δ-phase, reaches 90% or more by area ratio, and
• the mean grain size in the macrostructure during melt-solidification is 300 mm or less.