AISI4340高强钢在含氧和/或Cl-高温水中的应力腐蚀行为
Stress Corrosion Behavior of AISI4340 High Strength Steel in High Temperature Water Containing Oxygen and/or Cl-
摘 要
采用慢拉伸应力腐蚀试验与应力腐蚀裂纹扩展试验，对AISI4340钢在含饱和氧和/或0.1 mol·L-1 Cl-的100 ℃水中的应力腐蚀行为进行研究。结果表明：100 ℃水中存在的氧或Cl-均可以增大AISI4340钢的应力腐蚀倾向，但在含Cl-并除氧的100 ℃水中的应力腐蚀倾向不显著，慢拉伸断口依旧保留部分韧性断裂特征，而在含饱和氧的高温水中AISI4340钢发生完全脆性断裂，应力腐蚀倾向显著；氧或Cl-均可提高AISI4340钢在100 ℃水中的应力腐蚀裂纹扩展速率，氧与Cl-之间存在交互作用，二者共存显著提高了应力腐蚀倾向，并导致开裂后裂纹快速扩展。
饱和氧
Cl-
裂纹扩展速率
应力腐蚀
AISI4340 high strength steel
saturated oxygen
Cl-
crack growth rate
stress corrosion
Abstract
Slow tensile stress corrosion tests and stress corrosion crack growth tests were used to study the stress corrosion behavior of AISI4340 steel in water at 100 ℃ containing saturated oxygen and/or 0.1 mol·L-1 Cl-. The results show that the presence of oxygen or Cl- in water at 100 ℃ could increase the stress corrosion tendency of AISI4340 steel. The stress corrosion tendency in deoxygenated 100 ℃ water containing Cl- was not significant, and the slow tensile fracture retained some ductile fracture characteristics; complete brittle fracture of AISI4340 steel occurred in the high temperature water containing saturated oxygen, and the stress corrosion tendency was significant. Oxygen or Cl- could increase the stress corrosion crack growth rate of AISI4340 steel in water at 100 ℃. There was an interaction between oxygen and Cl-, so their co-existence significantly increased the stress corrosion tendency and caused rapid crack growth after cracking.
中图分类号 TG172 DOI 10.11973/jxgccl202102003
所属栏目 试验研究
基金项目 “十二五”国家科技支撑计划项目（2011BAK06B03）；国家“863”计划项目（2012AA040103）；安徽工业大学优秀创新团队资助项目（000452）
收稿日期 2020/2/12
修改稿日期 2020/10/19
网络出版日期
作者单位点击查看
备注马涛(1995-),男,安徽铜陵人,硕士研究生
引用该论文: MA Tao,ZHANG Xiaofei,HUA Xiaochun,ZHAO Li,RAO Sixian. Stress Corrosion Behavior of AISI4340 High Strength Steel in High Temperature Water Containing Oxygen and/or Cl-[J]. Materials for mechancial engineering, 2021, 45(2): 15～19
马涛,张肖飞,华晓春,赵丽,饶思贤. AISI4340高强钢在含氧和/或Cl-高温水中的应力腐蚀行为[J]. 机械工程材料, 2021, 45(2): 15～19
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【9】宋光雄, 张晓庆, 常彦衍, 等. 压力设备腐蚀失效案例统计分析[J]. 材料工程, 2004, 32(2):6-9. SONG G X, ZHANG X Q, CHANG Y Y, et al. Corrosion failure cases about pressure vessels and pipes[J]. Journal of Materials Engineering, 2004, 32(2):6-9.
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