摘要
某制氢装置中变冷却系统的奥氏体不锈钢弯头热影响区出现了多条穿透性裂纹。通过宏观检查、硬度测试、化学分析、射线检测、金相组织和电镜等检测试验,对裂纹成因进行了分析,确定裂纹性质为沿晶应力腐蚀裂纹。提出了预防措施和建议。
Several penetrated cracks occurred in the heat affecting zone of austenitic stainless steel elbow of medium temperature shift cooling system in a hydrogen plant.Cracking reasons were analyzed by macroscopic examination, hardness test,chemical compositions analysis,X-ray test,metallographic structure and SEM testing,etc.The nature of cracking was determined to be intergranular stress corrosion cracking.Some precautions and suggestions were proposed.
出处
《腐蚀与防护》
CAS
北大核心
2010年第4期324-327,共4页
Corrosion & Protection
关键词
硬度
露点
CO2腐蚀
晶界敏化
残余应力
hardness
dew point
CO2 corrosion
grain boundary sensitization
residual stress
