广州珠江电厂燃气联合循环项目高压缸螺栓断裂失效分析

华电技术 ›› 2013, Vol. 35 ›› Issue (6): 36-39.

广州珠江电厂燃气联合循环项目高压缸螺栓断裂失效分析

(广州珠江电厂，广东广州〓511458)

出版日期:2013-06-25 发布日期:2013-07-23

Analysis on fracture failure of highpressure cylinder bolts of gassteam combined cycle project in Guangzhou Zhujiang Power Plant

(Guangzhou Zhujiang Power Plant, Guangzhou 511458, China)

Online:2013-06-25 Published:2013-07-23

摘要/Abstract

摘要：

摘要：通过宏观检验、化学成分分析、力学性能试验、金相检验、能谱分析和断口分析等试验，对广州珠江电厂燃气联合循环项目 #2蒸汽轮机高中压缸断裂螺栓进行了失效分析，结果表明：螺栓失效的模式是应力腐蚀开裂，导致螺栓断裂的主要原因是电加热器短路放电使中心孔壁形成应力集中的凹坑。

关键词: 关键词：高压缸, 断裂螺栓, 失效分析, 应力腐蚀, 开裂

Abstract:

Abstract:The failure analysis of fractured bolts of highpressure cylinder of steam turbine No.2 in gassteam combined cycle project of Guangzhou Zhujiang Power Plant was carried out by several tests, which include macroscopic examination, chemical component analysis, mechanical property test, metallographic inspection, energy spectrum analysis, fracture analysis and others. The results show that the bolt failure mode is stress corrosion crack, and the main reason causing the bolt fracture is the shortcircuit and electrodischarge fault of the electrical heater, which caused a pit with stress concentration on the centre hole wall.

Key words: Key words:highpressure cylinder, fractured bolt, failure analysis, stress corrosion, crack

汪龙平. 广州珠江电厂燃气联合循环项目高压缸螺栓断裂失效分析[J]. 华电技术, 2013, 35(6): 36-39.

WANG Longping. Analysis on fracture failure of highpressure cylinder bolts of gassteam combined cycle project in Guangzhou Zhujiang Power Plant[J]. Huadian Technology, 2013, 35(6): 36-39.

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