焼戻し脆性の英語

板厚５０ｍｍ以上の鋼板の多層盛突合せ溶接継手において、表面溶接層と裏面溶接層間の溶接層のうち、少なくとも一つの溶接層が、その上層の溶接層の溶接の際に焼戻し効果を付与されて他の溶接層より優れた靭性を有し、脆性き裂の伝播を抑制又は止める破壊抵抗層として機能する多層盛突合せ溶接継手とする。例文帳に追加

In the multi-layer butt weld joint of a steel plate having a thickness of 50 mm or more, at least one weld layer among weld layers between surface weld layer and rear surface weld layer has a toughness superior than that of the other weld layers by being imparted with tempering effect when its upper layer is welded, and functions as a breakage resistant layer suppressing or stopping the propagation of brittle crack. - 特許庁