| 摘要 |
The present invention relates to a high-hardness hardfacing alloy powder, containing: 0.5<C≦̸3.0 mass %, 0.5≦̸Si≦̸5.0 mass %, 10.0≦̸Cr≦̸30.0 mass %, and 16.0<Mo≦̸40.0 mass %, with the balance being Co and unavoidable impurities, wherein a total amount of Mo and Cr satisfies 40.0≦̸Mo+Cr≦̸70.0 mass %. The high-hardness hardfacing alloy powder according to the present invention may further contain at least one element selected from the group consisting of: Ca≦̸0.03 mass %, P≦̸0.03 mass %, Ni≦̸5.0 mass % and Fe≦̸5.0 mass %. The high-hardness hardfacing alloy powder according to the present invention can be employed for build-up welding of a face part of a valve used in various internal combustion engines, automotive engines, steam turbines, heat exchangers, heating furnaces and the like.
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