Accessible Requires Authentication Published by De Gruyter September 7, 2020

Effects of rail flash-butt welding and post-weld heat treatment processes meeting different national standards on residual stresses of welded joints

Rui Ma, Dan Huang, Jiao Zhang, Yang Zhang and Qibing Lv

Abstract

This study investigates residual stresses of the welded joint heat-affected zone for the processes that meet the Chinese and European standards of field rail welding. Furthermore, this study investigates the factory rail welding process and different normalizing methods in China. According to the residual stresses data and the Debye ring test result, the residual stresses distribution of the welded joint meets the Chinese standard and uses induction normalizing treatment resulting in the best service performance and an improvement in grain size uniformity. In the absence of a normalizing process, the ideal welding process that meets the Chinese standard is actually inferior to that which meets the European standard, with regard to a uniform distribution of the residual stresses of the welded joint.


Correspondence address, Professor Qibing Lv, School of Materials Science and Engineering, Southwest Jiaotong University, No. 111, Section 1, 2nd Ring Road North, Chengdu, 610000, P.R. China, Tel.: +86 13438148587, Fax: +86 02887600722, E-mail: , Web: http://userweb.swjtu.edu.cn/Userweb/xnjdlvqibing/index.htm

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Received: 2020-03-23
Accepted: 2020-05-26
Published Online: 2020-09-07
Published in Print: 2020-09-16

© 2020, Carl Hanser Verlag, München