600MW 机组锅炉水冷壁大面积环向裂纹泄漏原因分析及治理对策

Analysis of Underlying Causes and Countermeasures for Dealing with Large Circumferential Cracks in a 600 MW Boiler Water Wall

作者在文献〔１〕〔２〕中对某电厂６００ＭＷ机组锅炉水冷壁频繁出现大面积环向裂纹进行了失效分析，并对电化学腐蚀在疲劳裂纹萌生和扩展过程中的作用进行分析。本文在此基础上对环向裂纹形成的原因进行综合分析，并提出了治理措施和建议。

The authors have made a failure analysis of the repeated emergence of large circumferential cracks in the 600 MW boiler water wall of a power station(see paper, in references)and investigated the role of electrochemical corrosion in the formation and propagation of fatigue cracks On the basis of the above a comprehensive analysis is given of the causation of such circumferential fissures with pertinent countermeasures being proposed