理化检验-物理分册2025，Vol.61Issue(5)：69-74,6.DOI:10.11973/lhjy-wl240061
某超临界锅炉水冷壁管开裂原因
Cracking reason of water wall tube of a supercritical boiler
卢忠铭 1封小亮 1刘课秀1
作者信息
- 1. 广州特种设备检测研究院,广州 510663
- 折叠
摘要
Abstract
The cracking and leakage accident of water wall tube of a supercritical boiler occurred during operation.The causes of cracking and leakage of water wall tube were analyzed by means of macroscopic observation,chemical composition analysis,mechanical property test,metallographic examination,scanning electron microscope and energy spectrum analysis.The results show that the cyclic thermal stress caused the inner and outer walls of the water wall to form a crack source.Under the interaction of corrosive flue gas and thermal fatigue,the outer wall cracks continued to expand to form a penetrating transverse fatigue crack,which led to the leakage of the water wall tube.关键词
水冷壁管/循环热应力/热疲劳开裂/腐蚀/显微组织Key words
water wall tube/cyclic thermal stress/thermal fatigue cracking/corrosion/microstructure分类
金属材料引用本文复制引用
卢忠铭,封小亮,刘课秀..某超临界锅炉水冷壁管开裂原因[J].理化检验-物理分册,2025,61(5):69-74,6.
