复合甲基二乙醇胺冷却器开裂机理分析  

ANALYSIS ON MECHANISM OF CRACKS IN COMPOSITE METHYL DIETHANOLAMINE COOLER

作　　者：董雪林 郭华强 黄苑球 

机构地区：[1]机械动力部 [2]炼油二部

出　　处：《广石化科技》2009年第4期36-41,共6页

摘　　要：脱硫二装置溶剂再生Ⅱ单元的贫液冷却器出现焊缝部位严重开裂，通过外观、化学分析、拉伸、冲击、金相、断口电镜（微观分析及能谱分析）等综合分析，结果表明焊缝部位严重开裂是碱应力腐蚀开裂（ASCC）。提出了设备需整体热处理、工艺降低温度操作等建议。Some severe weld cracks occur in two lean solution coolers of solvent regeneration unit Ⅱ of desulfurization plant. The visual inspection, the chemical analysis, the tensile and impact tests, the metallographic analysis, the fracture microstructure analysis, the energy spectrum analysis, and so on, of the cracks were done. The result shows that the weld cracks are alkali stress corrosion cracks （ASCC）. So solutions to this problem, such as the heat treatment of entire equipment and the decrease of process temperature, are put forward.

关 键 词：甲基二乙醇胺 贫液 冷却器 碱应力腐蚀开裂 

分 类 号：TQ226.31[化学工程—有机化工] TG172.9[金属学及工艺—金属表面处理]