【作者】 董晨； 付长明； 屈伸； 田继丰；

【Author】 DONG Chen,FU Chang-ming,QU Shen,TIAN Ji-feng (Materials Failure Analysis Center,Shenyang National Laboratory for Materials Science(SYNL),Institute of Metal Research(IMR),Chinese Academy of Sciences(CAS),Shenyang,110004,China)

【机构】 中国科学院金属研究所沈阳材料科学国家(联合)实验室材料失效分析中心；

【摘要】 本文根据0Cr18Ni10Ti废热锅炉管服役环境,通过成分分析、金相检验、扫描电镜观察、X射线能谱分析、力学性能测试等方法对废热锅炉换热管爆裂进行失效分析,研究了锅炉管爆裂原因。结果表明:换热管爆管属于有氯离子参与的连多硫酸应力腐蚀开裂,来源是换热管未按标准要求进行固溶处理,导致换热管具有较高残余应力,应力主要为环向张应力。更多还原

【Abstract】 According to the service environment of 0Cr18Ni10Ti waste heat-exchange tube,the reason for blowout of the boiler tube was analyzed through the composition analysis,metallographic examination,scanning electron microscope,X-ray spectrum analysis,mechanical property testing methods.The results show that the heat exchange tube blasting can be attributed to the stress corrosion cracking due to the chlorine ion in polythionic acid because the heat exchange tube was not subjected to solid-solution treatment,which led to a high residual tensile stress mainly along the circumference.更多还原