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本文研究了ＧＣ－４、３０ＣｒＭｎＳｉＮｉ２Ａ和３００Ｍ超高强钢的腐蚀疲劳裂纹扩展行为。考虑了环境、热处理制度、应力比和频率对裂纹扩展的影响。研究结果表明：腐蚀环境和热处理制度对疲劳裂纹扩展有显著影响。在侵蚀性环境中随频率降低，裂纹扩展大幅度上升，随应力比提高，环境影响加剧。利用扫描电镜对试样断口形貌进行了分析，并讨论了高强钢的腐蚀疲劳机理。
In this paper, the corrosion fatigue crack growth behavior of GC-4, 30CrMnSiNi2A and 300M ultra-high strength steel was studied. The effects of environment, heat treatment regime, stress ratio and frequency on crack propagation are considered. The results show that corrosion environment and heat treatment system have a significant impact on fatigue crack growth. In aggressive environments, the frequency decreases and the crack propagation increases sharply. As the stress ratio increases, the environmental impact is aggravated. The morphology of the fracture surface was analyzed by SEM, and the mechanism of corrosion fatigue of high strength steel was discussed.