TP347H不锈钢与BT700-l合金的应力腐蚀行为  

Stress corrosion behavior of TP347H stainless steel and BT700⁃l alloy

作　　者：李冬升[1] 刘仁才 涂宇航 兰轲钰 Li Dongsheng;Liu Rencai;Tu Yuhang;Lan Keyu(School of Materials Science and Engineering,Jiangsu University,Zhenjiang Jiangsu 212013,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《金属热处理》2024年第8期1-8,共8页Heat Treatment of Metals

基　　金：国家自然科学基金面上项目(51874146)。

摘　　要：利用慢应变速率拉伸(SSRT)应力腐蚀试验,对高盐腐蚀环境下TP347H不锈钢与BT700-l合金的应力腐蚀开裂(SCC)行为进行了研究。结果表明:在不同pH值高盐溶液中TP347H不锈钢与BT700-l合金均未发生SCC行为;仅在酸性腐蚀环境中由于Cl^(-)致敏和H^(+)催化促进下致使TP347H不锈钢与BT700-l合金表现出一定的SCC倾向,断口呈现韧-脆混合开裂特征;在酸性腐蚀环境中,BT700-l合金的抗应力腐蚀性能明显高于TP347H不锈钢。Stress corrosion cracking(SCC)behavior of TP347H stainless steel and BT700⁃l alloy in high concentration salt corrosion environment was studied by using slow strain rate tensile(SSRT)stress corrosion test.The results show that there is no SCC behavior between the TP347H stainless steel and BT700⁃l alloy in high concentration salt solution with different pH values.The TP347H stainless steel and BT700⁃l alloy show a certain SCC tendency under the condition of Cl^(-)sensitization and H^(+)catalysis in acidic corrosion environment,and the fractures are tough⁃brittle mixed cracking.The stress corrosion resistance of the BT700⁃l alloy in acid corrosion environment is significantly higher than that of the TP347H stainless steel.

关 键 词：TP347H不锈钢 BT700-l合金 慢应变速率拉伸 应力腐蚀(SCC) 高盐溶液 

分 类 号：TG132.3[一般工业技术—材料科学与工程]