| abstract |
(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a sliding portion overlay material having high hardness, excellent overlaying workability, and good slidability. SOLUTION: This is a metal material that is welded to a base material and built up, and is a cobalt-based alloy containing cobalt, molybdenum, silicon, chromium, and chromium carbide, the composition ratio of which is Mo; 25-35%, Si; 2-4%, Cr; 10-20%, CrmCn: 2.5 to 20%, Co: balance. |