反应产物与混氢油换热器返修案例  

The Case of Repair of Reaction Product and Hydrogen-mixed Oil Heat Exchanger

作　　者：杨博[1] 黄奕昶[1] 钱耀洲[1] 宋盼[1] 

机构地区：[1]上海市特种设备监督检验技术研究院

出　　处：《化工装备技术》2017年第2期41-43,共3页Chemical Equipment Technology

基　　金：上海市质监局系统项目No.2014-50

摘　　要：在进行某反应产物与混氢油换热器的全面检验期间,发现该设备本体环缝处有疑似裂纹的缺陷。该设备本体材料为12Cr2Mo1R,焊接时极易产生淬硬的显微组织,再加上焊缝区高浓度的扩散氢和一定的焊接残余应力共同作用,焊接接头易产生氢致延迟裂纹。制定了返修方案,对焊缝进行了科学合理的修复,并经无损检测确认合格。During the comprehensive inspection of a reaction product and hydrogen-mixed oil heat exchanger, one suspected crack was detected in the circular seam of the heat exchanger. The base material of the heat exchanger was 12Cr2Mo1R, and the hardened microstructure is quite easy to occur when the material was welded. At the same time, the weld zone contained high concentration diffusible hydrogen and suffered certain welding residual stress. Those interactive factors caused the hydrogen-induced delayed crack in the welded joint. The repair program was developed, the weld seam was scientifically and reasonably repaired, and which was confirmed by non- destructive testing.

关 键 词：换热器 混氢油 焊缝 热处理 裂纹 返修 无损检测 

分 类 号：TE965[石油与天然气工程—石油机械设备]