某厂600MW超临界锅炉在水冷壁消缺临检后进行风压检漏时发现屏式过热器炉外部位管道泄漏,经过对锅炉安装情况及运行操作的系列分析,确定焊口热处理不合格及停炉冷却速度较快是此次焊缝热影响区开裂的原因。 A factory 600MW supercritical boiler in the water wall after the absence of air pressure leak detection leaks found outside the screen superheater pipe leaks, after the boiler installation and operation of a series of analysis to determine the weld heat treatment failure and Shut down furnace cooling rate is faster heat affected zone cracking reason.