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^(-)

作　　者：马涛 张肖飞 华晓春 赵丽 饶思贤[1,2] MA Tao;ZHANG Xiaofei;HUA Xiaochun;ZHAO Li;RAO Sixian(School of Mechanical Engineering,Anhui University of Technology,Maanshan 243032.China;Hefei General Machinery Research Institute,Hefei 230031,China)

机构地区：[1]安徽工业大学机械工程学院,马鞍山243032 [2]合肥通用机械研究院,合肥230031

出　　处：《机械工程材料》2021年第2期15-19,60,共6页Materials For Mechanical Engineering

基　　金：“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)。

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)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C一均可以增大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。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.

关 键 词：AISI4340高强钢 饱和氧 Cl^(-) 裂纹扩展速率 应力腐蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]