| 氢蚀对Cr-Mo钢断裂韧性和裂纹行为的影响 |
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| 引用本文： | 李晓刚,姚治铭,柯伟.氢蚀对Cr-Mo钢断裂韧性和裂纹行为的影响[J].辽宁石油化工大学学报,1997(3). |
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| 作者姓名： | 李晓刚 姚治铭 柯伟 |
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| 作者单位： | 抚顺石油学院化工机械系，中国科学院金属腐蚀与防护研究所国家腐蚀科学重点实验室 |
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| 摘 要： | 选用经４００℃，２０ＭＰａ，１０５ｈ氢暴露后的Ｃｒ－Ｍｏ钢进行了拉伸试验、疲劳试验和断裂韧性试验。结果表明，氢蚀使Ｃｒ－Ｍｏ钢强度、塑性和断裂韧性均降低，也使断裂机制由韧窝型转变为解理脆性，氢蚀使疲劳裂纹扩展速率增加，门槛值降低。Ｃｒ－Ｍｏ钢氢蚀后，随应力比Ｒ的增加，疲劳裂纹扩展门槛值大幅度降低。
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| 关 键 词： | Cr－Mo钢 氢蚀 疲劳 断裂 |
The Effect of Hydrogen Attack on Fracture and Fatigue Behaviours of Cr-Mo Steel |
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| Li Xiaogang.The Effect of Hydrogen Attack on Fracture and Fatigue Behaviours of Cr-Mo Steel[J].Journal of Liaoning University of Petroleum & Chemical Technology,1997(3). |
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| Authors: | Li Xiaogang |
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| Abstract: | Cr-Mo steel which exposed to hydrogen gas at 400℃, 20MPa for 10 5 hours were checked for making tensile test, fracfure and fatigue test in order to investigate the effect of hydrogen attack on Cr-Mo steel. The results showed that strength, ducitlitity and fracture toughness were lowered caused by hydrogen attack for Cr-Mo steel. The fracture mechanism was also changed by hydrogen attack, in which dimple translated to embrittlement. The propagation rate of fatigue crack d a d N was increased by hydrogen attack, but threhold values Δ K th decreased. Δ K th of Cr-Mo steel with hydrogen attack decreased largely with increasing of stress ratio R . |
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| Keywords: | Cr-Mo steel Hydrogen attack Fracture Fatigue |
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