Failure analysis of the leaking of fixed tube-sheet heat exchanger

	Failure analysis of the leaking of fixed tube-sheet heat exchanger
	Song, Wen-Ming 1,2; Yang, Gui-Rong 2; Guo, Zhi-Jun 1; Ma, Ying 2; Hao, Yuan 2; Li, Jian 3
刊名	Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment
	2014-12-25
卷号	35 期号:12 页码:107-113
关键词	Chemical analysis Corrosion Cracks Heat exchangers Microstructure Scanning electron microscopy Stress corrosion cracking Tubes (components) Welds Chemical compositions Corrosion products Fillet welds Heat exchanger tube High sensitivity National standard Stress concentrates Tube sheets
ISSN号	10096264
英文摘要	The leaking was appeared at the fillet weld of the fixed tube-sheet heat exchanger during running. The composition of heat exchanger tube and sheet, microstructure, corrosion appearance and chemical composition of the corrosion products in the failure samples were studied by means of optical microscope, scanning electron microscope and chemical analysis methods. The results show that the composition of heat exchanger tube and sheet meet the requirement of national standard. The main phases of the heat exchanger and heat affecting zone are ferrite and perlite, and martensite and bainite appeared in fillet weld. The difference of microstructure between the different zones of the weld is obvious. The medium among the shell can enter into the gap between the tube and sheet located at the fillet weld and stress concentrate, which can result in the high sensitivity of stress corrosion for the weld. The crack can happen at the bottom of the weld and then develope along the direction to the center of the weld, which led to the leaking of the heat exchanger. ©, 2014, Editorial Office of Transactions of Materials and Heat Treatment. All right reserved.
语种	中文
出版者	Editorial Office of Transactions of Materials and Heat Treatment
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113683]
专题	材料科学与工程学院
作者单位	1.Lanpec Technologies Limited, Lanzhou, China; 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, China; 3.Wuhan Research Institute of Materials Protection, Wuhan, China
推荐引用方式 GB/T 7714	Song, Wen-Ming,Yang, Gui-Rong,Guo, Zhi-Jun,et al. Failure analysis of the leaking of fixed tube-sheet heat exchanger[J]. Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment,2014,35(12):107-113.
APA	Song, Wen-Ming,Yang, Gui-Rong,Guo, Zhi-Jun,Ma, Ying,Hao, Yuan,&Li, Jian.(2014).Failure analysis of the leaking of fixed tube-sheet heat exchanger.Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment,35(12),107-113.
MLA	Song, Wen-Ming,et al."Failure analysis of the leaking of fixed tube-sheet heat exchanger".Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment 35.12(2014):107-113.