| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an austenite stainless steel weld joint having excellent steam oxidation resistance.SOLUTION: An austenite stainless steel weld joint has a chemical composition containing, by mass%, C:0.2% or less, Si:2.0% or less, Mn:0.1 to 3.0%, Cr:14 to 28%, Ni:6 to 30%, N:0.3% or less, Mo:0 to 5%, W:0 to 10%, Ta:0 to 5%, Cu:0 to 5%, V:0 to 1.0%, Nb:0 to 1.5%, Ti:0 to 0.5%, Ca:0 to 0.02%, Mg:0 to 0.02%, Al:0 to 0.3%, Zr:0 to 0.5%, B:0 to 0.02%, rare earth elements of 0 to 0.1% and the balance Fe with inevitable impurities. The stainless steel weld joint has further a surface which a blast treatment by a projection material is conducted. Further a crystal grain size number at a depth position of 50μm from a surface of a welding heat affected zone is larger than that at a thickness central part of a base material part.</p> |
