304不锈钢液氨蒸发器管束失效分析  

Failure Analysis of 304 Stainless Steel Used for Liquid Ammonia Evaporator Tube Bundle

作　　者：吕永超[1] 丁毅[1] 马立群[1] 孟宪虎[2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]江苏众信绿色管业科技有限公司,江苏南京210041

出　　处：《铸造技术》2013年第12期1673-1675,共3页Foundry Technology

摘　　要：分析了管束发生泄漏的原因以及腐蚀机理。结果表明,管束首先在腐蚀介质和温度的共同作用下发生了严重的均匀腐蚀减薄;然后在应力和腐蚀介质的共同作用下,发生了应力腐蚀开裂;最后在应力以及晶间腐蚀的共同作用下,管束发生了开裂泄漏。The reason for the leak of evaporator tube bundle and the corrosion mechanism were analyzed. The results show that the uniform corrosion thinning of the tubes were caused by the combining corrosion medium and temperature firstly, and then the corrosion cracking was developed by the combination of the stress and corrosion medium, and lastly the tube bundle cracks and leaks due to the stress and intergranular corrosion.

关 键 词：蒸发器 304不锈钢 失效分析 应力腐蚀 晶间腐蚀 

分 类 号：TG115[金属学及工艺—物理冶金]