高張力鋼溶接熱影響部における水素による割れと部分溶融(第4報)
硫化介在物の形態と水素助長割れ感受性
1983 年 1 巻 1 号 p. 3-9
詳細
1983 年 1 巻 1 号 p. 3-9
Morphology and locality of sulfide inclusions in HAZ of both HY80 and SM50B steels were observed, and the relation between sulfide inclusions and susceptibility to hydrogen-assisted cracking was examined.
The sulfide inclusions in HAZ of HY80 steel heated to 1450°C were located in the form of array in a rolling direction. The morphology and locality of dotlike sulfide inclusions in HY80 steel HAZ were quite different from those in SM50B steel HAZ heated to 1450°C.
Consequently, it was known that the morphology and locality characteristic of sulfide inclusions seen in HY80 steel HAZ have a close velationship to the high susceptibility to hydrogen-assisted cracking of HY80 steel HAZ.
