氢蚀程度对２０Ｇ钢Ｋ_（ＩＣ）及△Ｋ_（ｔｈ）的影响郦建立，李晓刚，谢根栓，李彦，姚治铭，李劲，柯伟（中国科学院金属腐蚀与防护研究所腐蚀与防护国家重点实验室沈阳１１００１５）（抚顺石油学院，抚顺石油三厂）１引言氢腐蚀（ＨＡ）使材料的力学性能和疲劳断裂性能严重恶化，是化学工业、石油化工、煤转化工业临氨装置主要的损坏形式。对临氢后的２．２５Ｃｒ－ＩＭｏ＄疲劳性能、断裂性能的研究结果表明，氢蚀使西Ｋ?...
The effects of hydrogen atted (HA) caused by exposure to hydrogen atmosphere at different temperstures under 18MPa for 240hrs on mechanical Properties for 20G steel were studied. In this study hydrogen attack intensity was defined as % of strength loss. The tensile tests showed that tensile strength decreased considerably with increasing hydrogen attack. The COD testing indicated that δc,KIC decreased with increasing hydrogen attack. The variation of threshold △K value with hydrogen attack was not so simple.It decreased initially and then increased, resulting in a valley on △K～HA % plot. It was suggested thst the knowledge of influence of HA % on △Kth and KIC would be important for engineering practice.
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