不锈钢换热管的失效分析  

Failure Analysis of Stainless Steel Heat Exchange Tube

作　　者：王立坤 陈海 魏培生 祝加轩 张文泽 WANG Likun;CHEN H ai;WEI Peisheng;ZHU Jiaxuan;ZHANG Wenze(Pressure Vessel Inspection Institute,PetroChina Dushanzi Petrochemical Corporation,Karamay 833699,China)

机构地区：[1]中国石油独山子石化分公司压力容器检验所,克拉玛依833699

出　　处：《腐蚀与防护》2020年第10期74-78,共5页Corrosion & Protection

基　　金：国家重点研发计划课题(2016YFC0801903)。

摘　　要：某化工厂换热器的0Cr18Ni10Ti不锈钢换热管发生开裂。为查明开裂管道的失效原因,对其进行化学成分、硬度、金相、断口形貌和腐蚀产物分析。换热管发生开裂原因为管道加工后残余应力较大,在氯离子环境中发生了应力腐蚀开裂(SCC)。Some 0Cr18Ni10Ti stainless steel heat exchange tubes of a heat exchanger in a chemical plant cracked.In order to find out the causes of failure,the chemical composition,hardness,metallography,fracture morphology and corrosion products of the cracked tubes were analyzed.The reason for cracking of the heat exchange tubes was that the residual stress in the tubes after processing was large,and stress corrosion cracking(SCC)occurred in chloride ion environment.

关 键 词：0Cr18Ni10Ti不锈钢 氯离子 应力腐蚀开裂(SCC) 

分 类 号：TE98[石油与天然气工程—石油机械设备]