Patent ID: 7757396

Claim:
A raw-material powder for a laser clad valve seat, comprising a powder mixture of: a Cu based alloy powder of 80% to 99% by weight of the powder mixture comprising: B: 0.5 to 5% by weight, Ni: 0 to 20% by weight, Fe plus Co: 0 to 10% by weight, Si: 0 to 5% by weight, Al: 0 to 3% by weight, and the balance Cu and unavoidable impurities; and an Fe or Co based alloy powder of 1 to 20% by weight of the powder mixture, having a Vickers hardness of 500 HV or higher and an average particle diameter of 50 to 200 μm and comprising: Mo: 5 to 40% by weight, Cr: 0 to 25% by weight, Si: 0 to 5% by weight, and the balance Fe or Co and unavoidable impurities.