Patent ID: 9412482
Filing Date: 2016-08-09
CPC Classification: C21D,C22C,C22F,H01B

Claim Text:
1. A copper alloy sheet material having a chemical composition containing from 0.80 to 3.50% by mass of Ni, from 0.50 to 2.00% by mass of Co, from 0.30 to 2.00% by mass of Si, from 0 to 0.10% by mass of Fe, from 0 to 0.10% by mass of Cr, from 0 to 0.10% by mass of Mg, from 0 to 0.10% by mass of Mn, from 0 to 0.30% by mass of Ti, from 0 to 0.20% by mass of V, from 0 to 0.15% by mass of Zr, from 0 to 0.10% by mass of Sn, from 0 to 0.15% by mass of Zn, from 0 to 0.20% by mass of Al, from 0 to 0.02% by mass of B, from 0 to 0.10% by mass of P, from 0 to 0.10% by mass of Ag, from 0 to 0.15% by mass of Be, and from 0 to 0.10% by mass of REM (rare earth element), with the balance being Cu and inevitable impurities, wherein in second phase particles existing in a matrix, a number density of “ultrafine second phase particles” having a particle diameter of 2 nm or more and less than 10 nm is 1.0×10 9 number/mm 2 or more, a number density of “fine second phase particles” having a particle diameter of 10 nm or more and less than 100 nm is not more than 5.0×10 7 number/mm 2 , and a number density of “coarse second phase particles” having a particle diameter of 100 nm or more and not more than 3.0 μm is 1.0×10 5 number/mm 2 or more and not more than 1.0×10 6 number/mm 2 ; and having a crystal orientation satisfying the following equation (1): wherein I{200} represents an integrated intensity of an X-ray diffraction peak of the crystal plane on the copper alloy sheet material sheet surface; and I 0 {200} represents an integrated intensity of an X-ray diffraction peak of the {200} crystal plane in a pure copper standard powder sample.