摘要
采用楔形张开加载（WOL）恒位移预裂纹试样研究了16MnR钢和15MnVR钢在氢氧化钠溶液中的抗应力腐蚀性能。测得了180℃下30％NaOH溶液中两种材料的应力腐蚀临界应力强度因子和裂纹扩展速率，即16MnR材料的应力府蚀裂纹扩展速率da／dt为0．039～0．040mm／h，KISCC不大于82．75～90．85MPa·m^0.5，15MnVR材料的应力腐蚀裂纹扩展速率da／dt为0．018mm／h，KM。不大于87．58～102．44MPa·m^0.5。同时采用扫描电镜和能谱技术对断口进行了相应的观察和理论分析，得出NaOH溶液中两种材料均为沿晶开裂。
Stress corrosion cracking（SCC） of 16MnR steel and 15MnVR steel were studied by the method of stress corrosion test for procracked wedgeopen loading（WOL） specimens in sodium hydroxide solution. After the tests in 30% （WT） concentrations of sodium hydroxide solution with the 180 ℃ , the crack growth rate and threshold stress intensity factors of the two steels were obtained , that were, the 16MnR steel between 0.039 - 0. 040 mm/h and lower than 82.75 - 90.85 MPa · m^0.5 ; the 15MnVR steel 0. 018 mm/h and lower than 87.58 - 102.44 MPa · m^0.5. The SEM and EDX technology were also used for the analysis of specimens＇ section. The characteristic of intergranular stress corrosion cracking were showed on both steels in this system.
出处
《压力容器》
北大核心
2008年第8期1-5,共5页
Pressure Vessel Technology
关键词
氢氧化钠
应力腐蚀
16MnR
15MnVR
临界应力强度因子
裂纹扩展速率
sodium hydroxide solution
stress corrosion crack
16MnR steel
15MnVR steel
threshold stress intensity factor
crack growth rate
