オーステナイトステンレス鋼溶接金属の低温靱性と凝固割れ感受性の改善

概要

論文の詳細を見る
Austenitic stainless steel weld metal was studied concerning the toughness at cryogenic temperature and the hot cracking during welding. The results are as follows : (1) By the stress relief heat treatment (SRT) the weld metals containing more than 4% of delta-ferrite are severely embrittled at -196℃. The toughness of fully austenitic weld metal through SRT was decreased with carbon increasing. (2) The numbers of inclusions of 0.5 to less than 1.0μ size, which are mostly detrimental to the toughness at -196℃, in the weld metal by (Ar+15%CO_2) shielding gas are about ten times more than one by Ar shielding gas. (3) Fully austenitic stainless steel can attain a highly improved hot cracking resistance, almost equal to that of 304,by limiting the segregation of P, S, and Si at grain boundary on solidification.
社団法人溶接学会の論文
1981-12-05