某电站锅炉TP347H钢制过热器管失效分析  

Failure Analysis of TP347H Steel Superheater Tube in a Power Plant Boiler

作　　者：程翔 金莎莎 潘英峰 CHENG Xiang;JIN Shasha;PAN Yingfeng(Anhui Xinli Electric Power Technology Consulting Co.,Ltd.,Hefei 230601,China)

机构地区：[1]安徽新力电业科技咨询有限责任公司,安徽合肥230601

出　　处：《安徽电气工程职业技术学院学报》2024年第4期88-92,共5页Journal of Anhui Electrical Engineering Professional Technique College

摘　　要：文章通过宏观检查、化学成分分析、力学性能测试、微观组织分析和能谱(Energy Dispersive Spectrometer,EDS)元素分析等方法分析了某电站锅炉TP347H钢制过热器管失效原因。结果显示,该过热器管受锅炉启停炉和负荷大幅升降的影响,在管内壁形成热疲劳裂纹,随着微裂纹快速萌生和扩展,最终发生爆管。最后,从机组检修和运行角度给出了监督建议。This paper analyzes the failure reason of a TP347H steel superheater tube in a coal-fired power unit,through the macro inspection and analysis,chemical composition analysis,mechanical performance testing,microstructure analysis and EDS element analysis.The results show that the superheater tube is affected by the start-up and shutdown of the boiler,as well as significant fluctuations in load,leading to the formation of thermal fatigue cracks on the inner wall of the tube.As these micro-cracks rapidly initiated and expanded,it ultimately led to the pipe explosion.Finally,supervisory recommendations were provided from the perspective of unit maintenance and operation.

关 键 词：TP347H钢 过热器管 组织老化 热疲劳裂纹 失效 

分 类 号：TM621.2[电气工程—电力系统及自动化]