| 摘要 |
PROBLEM TO BE SOLVED: To provide a copper alloy sheet which is composed of a Cu-Ni-Sn-P based copper alloy and in which strength, bendability and stress relaxation resistance are simultaneously improved to high levels. SOLUTION: The copper alloy sheet is characterized by: having a composition consisting of, by mass, 0.1 to 5% Ni, 0.1 to 5% Sn, 0.01 to 0.5% P and the balance essentially Cu and further containing, if necessary, one or more kinds among≤3% Fe,≤5% Zn,≤1% Mg,≤1% Si and≤2% Co or further containing≤3%, in total, of one or more elements among Cr, B, Zr, Ti, Mn and V, the balance essentially Cu; and having a crystal orientation satisfying inequality Iä420}/I<SB>0</SB>ä420}>1.0 (where Iä420} is an X-ray diffraction intensity of ä420} crystal plane in the sheet surface of the copper alloy sheet and I<SB>0</SB>ä420} is an X-ray diffraction intensity of ä420} crystal plane of a standard powder of pure copper). COPYRIGHT: (C)2009,JPO&INPIT |
