研究了氢蚀温度对２０Ｇ和１５ＣｒＭｏ钢常规力学性能与疲劳性能和机制的影响以及应力比对氢蚀后２０Ｇ钢疲劳性能的影响结果表明，氢蚀后２０Ｇ钢的疲劳行为受氢蚀对材料损伤程度和氢蚀导致粗糙的裂纹途径造成闭合效应增加两因素联合作用；氢蚀后１５ＣｒＭｏ钢脱碳严重，其疲劳行为仅受脱碳对材料损伤作用的影响；应力比对２０Ｇ疲劳性能也有很大影响 The effects of hydrogen etching temperature on the mechanical properties and fatigue properties and mechanical properties of 20G and 15CrMo steel were studied. The effect of stress ratio on the fatigue properties of 20G steel after hydrogenation was studied. The results show that the fatigue behavior of 20G steel after hydrogen erosion is damaged by hydrogen ablation The degree of corrosion and hydrogen erosion lead to the rough crack path, which leads to the combination of two factors: the corrosion of 15CrMo steel is serious after decarburization, and its fatigue behavior is affected only by the effect of decarburization on the material; the stress ratio has a great effect on the fatigue performance of 20G influences