理化检验-物理分册2017，Vol.53Issue(10)：757-760,4.DOI:10.11973/lhjy-wl201710014
某电厂水冷壁管断裂失效分析
Failure Analysis on Fracture of the Water-Cooling Wall Tube in a Thermal Power Plant
王兆民 1程义2
作者信息
- 1. 哈尔滨锅炉厂有限责任公司 材料研究所,哈尔滨 150046
- 2. 高效清洁燃煤电站锅炉国家重点实验室,哈尔滨 150046
- 折叠
摘要
Abstract
By means of macroscopic examination,chemical composition analysis,mechanical property test, metallographic examination,fracture SEM analysis and so on,the fracture reasons of the water-cooling wall tube in a thermal power plant were analyzed.The results show that the fracture of the water-cooling wall tube was caused by the propagation of the fatigue cracks which initiated from the defect of the weld seam between the pipe and the fin.The cracks propagated along the side facing fire and the side unexposed to fire,and eventually resulted in transversal fracture of the tube perpendicular to the tube axis.The higher hardness of the weld seam and presence of incomplete fusion defect were the internal causes for the fracture failure.Constant start-up and shut-down and too frequent load fluctuation were the external causes for the fracture failure.关键词
失效分析/水冷壁管/疲劳断裂/焊缝/未熔合/硬度Key words
failure analysis/water-cooling wall tube/fatigue fracture/weld seam/incomplete fusion/hardness分类
矿业与冶金引用本文复制引用
王兆民,程义..某电厂水冷壁管断裂失效分析[J].理化检验-物理分册,2017,53(10):757-760,4.
