气化炉激冷室堆焊层开裂原因  

Reasons for cracking of the welding layer in the quenching chamber of the gasifier

作　　者：蒋作文 崔倩倩 沈冬奎 孙振西[1] 李敞 惠进财 JIANG Zuowen;CUI Qianqian;SHEN Dongkui;SUN Zhenxi;LI Chang;HUI Jincai(Inspection Department,Shandong Antai Chemical Pressure Vessel Inspection Center,Ji’nan 250014,China;Shandong Institute for Porduct Quality Inspection,Ji’nan 250102,China)

机构地区：[1]山东省安泰化工压力容器检验中心检验部,济南250014 [2]山东省产品质量检验研究院,济南250102

出　　处：《理化检验（物理分册）》2024年第5期57-60,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：山东能源集团有限公司安泰检验科研项目(AT-2023-001)。

摘　　要：在对某气化炉进行定期检验过程中,发现气化炉激冷室内壁堆焊层存在大量树枝状裂纹,激冷水进口接管处出现穿透性裂纹。采用宏观观察、水质分析、金相检验、扫描电镜及能谱分析等方法对气化炉开裂原因进行分析。结果表明:气化炉底部黑水中含有大量氯离子,激冷室不锈钢堆焊层中镍元素含量较少,且气化炉长期在高温及应力条件下服役,最终导致堆焊层发生应力腐蚀开裂。During the regular inspection of a certain gasifier,it was found that there were a large number of dendritic cracks in the welding layer of the quenching chamber wall of the gasifier,and penetrating cracks appeared at the inlet connection of the quenching water.The causes of cracking in the gasifier were analyzed using methods such as macroscopic observation,water quality analysis,metallographic examination,scanning electron microscopy and energy spectrum analysis.The results show that the black water at the bottom of the gasifier contained a large amount of chloride ions,and the nickel element content in the stainless steel cladding layer of the quenching chamber was relatively low.Moreover,the gasifier had been in service under high temperature and stress conditions for a long time,ultimately led to stress corrosion cracking of the cladding layer.

关 键 词：气化炉 氯离子 堆焊层 应力腐蚀开裂 点腐蚀 

分 类 号：TB31[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—物理冶金]