焊管2025，Vol.48Issue(3)：61-67,7.DOI:10.19291/j.cnki.1001-3938.2025.03.010
动力锅炉过热段蒸汽盘管开裂失效分析
Failure Analysis of Steam Coil Cracking in Superheated Section of Power Boiler
摘要
Abstract
The cracking failure of steam coil in the superheated section of a power boiler in a petrochemical enterprise under calibrated conditions was analyzed.Through the macroscopic inspection of the section structure,and the microscopic analysis of the cracking area of the steam coil by metallographic analysis and scanning electron microscope,the results show that the steam coil has alkali stress corrosion under this condition,which leads to failure fracture.It is suggested that the vapour-liquid separation effect of the drum should be ensured in the later production operation to avoid steam carrying liquid droplets into the overheating section,causing local alkali concentration and inducing stress corrosion cracking;at the same time,strengthening the boiler water quality monitoring,strengthening the boiler operation specifications,and strictly controlling the alkali content in the furnace water can prevent the occurrence of such problems.关键词
蒸汽盘管/碱应力腐蚀开裂/失效分析Key words
steam coil pipes/alkali stress corrosion cracking/failure analysis分类
矿业与冶金引用本文复制引用
刘钊,杨程晖,兰雪诚,李思,谭伟..动力锅炉过热段蒸汽盘管开裂失效分析[J].焊管,2025,48(3):61-67,7.基金项目
中国石化西南油气分公司科技创新项目"川西气田集输脱硫平台站工艺优化研究"(项目编号JCS-67-2403). （项目编号JCS-67-2403）
