Method for evaluating reheat crack susceptibility and method for suppressing reheat cracking

摘要

PROBLEM TO BE SOLVED: To provide a reheat cracking sensitivity evaluation method capable of quantitatively evaluating reheat cracking.SOLUTION: A reheat cracking sensitivity evaluation method for evaluating sensitivity to the reheat cracking of an evaluation target, comprises: a step of forming a plurality of test pieces formed out of the same material as that of the evaluation target and different in an initial strain; a step of evaluating the presence or absence of the reheat cracking for each of the plurality of test pieces; a step of acquiring a correlation between a creep strain and the initial strain for defining an occurrence limit of the reheat cracking from reheat cracking evaluation results related to the respective test pieces; and a step of evaluating the sensitivity to the reheat cracking of the evaluation target from the initial strain and the creep strain of the evaluation target on the basis of the correlation.