Low stress welding technology without post-weld heat treatment

被引：3

作者：

Xu, J. J. ^{[1
]}

Chen, L. G. ^{[1
]}

Ni, C. Z. ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Welding Inst, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2009年 / 25卷 / 08期

关键词：

Residual stress; Vibratory welding; Welding joint; Finite element method; Fracture toughness; RESIDUAL-STRESS; TEMPERATURE DISTRIBUTION; REDUCTION; STEEL;

D O I：

10.1179/174328408X369393

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to assure the tightness and the service life of a full welded body ball valve, the temperature of grommet cannot exceed 150 degrees C. Therefore, post-weld heat treatment cannot be used to relieve the welding residual stresses. In this study, a low stress welding technology was studied. The type of welding joint was optimised through the finite element method and vibratory welding was employed to decrease the residual stress. At the same time, the fracture toughness behaviour of weld zone and heat affected zone in terms of crack tip opening displacement was investigated to assess the safety of valve without PWHT in the active service. Finally, the results are discussed and analysed.

引用

页码：976 / 980

页数：5

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