| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding Co-based alloy having an excellent cavitation erosion resistance and a fracture toughness value.SOLUTION: A welding Co-based alloy has a component composition containing, by mass%, Ni: 3.5 to 4.5 as an essential additional element, Mn: 0.5 to 10.0, W: 0.5 to 7.5 and Fe: 1.0 to 30.0 as an arbitrary additional element, and Co and an inevitable impurity. The Co-based alloy is excellent in cavitation erosion resistance, and has a fracture toughness value higher than that of stainless cast steel so that it can also be used in a high stress portion. |
