| 摘要 |
PROBLEM TO BE SOLVED: To suppress generation of decarbonization and cementation between high Cr steel and Ni-based superalloy and to suppress diffusion of C in a dissimilar material joint formed of the high Cr steel and the Ni-based superalloy.SOLUTION: A weld joint is a dissimilar material joint in which a ferrite-based Cr steel and an austenitic Ni-based superalloy are jointed by weld. Both the ferrite-based Cr steel and the austenitic Ni-based superalloy have Cr content of 10-15 mass%. By using the ferrite-based Cr steel having the Cr content of 10-15 mass%, and the austenitic Ni-based superalloy having the Cr content of 10-15 mass%, difference of the Cr content of both alloys can be suppressed to a small amount, so that decarbonization and cementation can be avoided. |
