鋼溶接部の再熱割れに関する冶金学的研究(第 5 報) : 再熱割れ感受性の冶金学的改善方策

概要

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This report is discussed the method of improvement at the sensitivity of steel to reheat cracking. Namely, a plan of improvement that be decrease the impurity element, P in steel is discussed. The experimental materials used the commercial HT80,A387-12,A533B steels and trial producted steels that be decrease the impurity element, P in those steels. The results of the study obtained are summaraized as follows : 1) From results of reheat cracking test by specimens of synthetic HAZ test or y-slit crack test, to decrease the impurity element, P in steel could be improve the sensitivity to reheat cracking. 2) The above results well be support a new mechanism of reheat cracking that take into consideration the embrittlement of grain boundary.
社団法人溶接学会の論文
1979-11-05