丙烯腈装置反应气体冷却器裂纹分析及修复技术  

Crack Analysis and Repair Technology for Acrylonitrile Plant Reaction Gas Cooler

作　　者：唐东辉[1] 王东[1] 丁武仁[1] 刘大昕[1] 郑启文[2] 

机构地区：[1]中国石油吉林石化公司,吉林吉林132022 [2]哈尔滨焊接研究所,黑龙江哈尔滨150080

出　　处：《压力容器》2012年第7期66-72,共7页Pressure Vessel Technology

摘　　要：对丙烯腈装置反应气体冷却器筒体(厚55 mm,16MnR)与上、下管板(厚230 mm,15CrMo锻)之间环缝区(B1,B2)查出的16处裂纹类缺陷的性质及成因进行了试验分析。结果表明,它们是由焊接中夹碳造成的增碳区(出现脆硬的马氏体和二次渗碳体)及根部严重夹渣缺陷引发的氢延迟裂纹,产生于焊接后冷却至200℃以下或焊后热处理之前期间。在解决探伤、缺陷清除、焊接裂纹控制、现场局部热处理等技术问题后,成功完成了修复任务。The nature and causes of identified 16 cracks class of defects in circular welds（B1,B2） between cylinder（thickness 55 mm,16MnR） and the upper or lower tube plate（thickness 230 mm,15CrMo forging） were studied.The result showed that they are hydrogen delayed cracking;caused by the serious carbon inclusion（occurred brittle-hard martensite and secondary cementite）and root slag inclusion;produced after welding cooled to below 200 ℃ or before post-weld heat treatment.After solve the defect inspection,defect removal,crack control,local heat treatment and other technical problems,reaction gas cooler has been successfully repaired.

关 键 词：丙烯腈装置反应气体冷却器 裂纹性质与成因 修复技术 

分 类 号：TH131.2[机械工程—机械制造及自动化] TE965[石油与天然气工程—石油机械设备]