Patent ID: 7811511

Claim:
A method for producing a particle dispersion copper alloy comprising particles dispersed in a matrix composed of a copper alloy, wherein an area ratio occupied by said particles in an arbitrary cross section is 10 to 20%; said method comprising the steps of: preparing a mixed powder by mixing a Cu alloy powder and a Co alloy powder at a weight ratio between said Cu alloy powder and said Co alloy powder as 99 to 85:1 to 15, said Cu alloy powder having a particle size of 10 to 150 μm and containing 6 to 12% by weight of Ni, 2 to 5% by weight of Si, 1 to 10% by weight of at least any one of Cr and Mo, 2 to 10% by weight of Co, 0.3 to 1% by weight of Al, 0.3 to 1.2% by weight of P, 0.5 to 1.5% by weight of Fe, and inevitable impurities and Cu as balance, and said Co alloy powder having a particle size of 10 to 150 μm and containing 20 to 35% by weight of at least any one of Cr and Mo, 1 to 3% by weight of Ni, 1 to 2.5% by weight of Si, 3 to 8% by weight of W, 1 to 3% by weight of Fe, 0.8 to 2% by weight of C, and inevitable impurities and Co as balance to prepare a mixed powder; and heating said mixed powder by laser or plasma to prepare said particle dispersion copper alloy.