1.前言 1500MPa级超级钢的实用化例子非常少,其中一个大的阻碍因素是延迟破坏。延迟破坏被认为是由间隙在钢中的氢引起,然而其机理还不清楚。延迟破坏特性的评价正在用各种方法进行,但是试样形状却不统一。因此,虽然关于延迟破坏特性的研究开展了很多,却难以把这些实验数据进行比较。本报告是探讨把延迟破坏特性像屈服强度或者抗拉强度一样作为材料固有的常数进行评价的方法。按照这种评价方法,材料延迟破坏特性单纯意义上的并且 1. Introduction 1500MPa stainless steel super-practical examples are very small, one of the major obstacles is delayed destruction. Delayed failure is believed to be caused by the gap hydrogen in the steel, but the mechanism is unclear. The evaluation of the delayed rupture characteristics is being performed in various ways, but the shapes of the specimens are not uniform. Thus, while much has been done on the delaying characteristics of delaying, it is difficult to compare these experimental data. This report explores ways to evaluate delayed destruction properties as material inherent constants, such as yield strength or tensile strength. According to this method of evaluation, the material is delayed in destructive properties in purely sense and