Article
Version 2
Preserved in Portico This version is not peer-reviewed
Railway Vehicle Wheel Restoration by Submerged Arc Welding and Its Characterization
Version 1
: Received: 11 April 2019 / Approved: 12 April 2019 / Online: 17 April 2019 (00:00:00 CEST)
Version 2 : Received: 11 April 2019 / Approved: 12 April 2019 / Online: 4 September 2019 (00:00:00 CEST)
Version 2 : Received: 11 April 2019 / Approved: 12 April 2019 / Online: 4 September 2019 (00:00:00 CEST)
A peer-reviewed article of this Preprint also exists.
Coo, B.-C.; Lee, Y.-J. Railway Vehicle Wheel Restoration by Submerged Arc Welding and Its Characterization. Sci 2020, 2, 33. Coo, B.-C.; Lee, Y.-J. Railway Vehicle Wheel Restoration by Submerged Arc Welding and Its Characterization. Sci 2020, 2, 33.
Abstract
When a railway vehicle moves on a curved rail, sliding contact occurs between the rail head side and wheel flange, which wears the wheel flange down. The thinned flange needs to be restored above the required minimum thickness for structural safety. In this study, a new process and welding wire for restoring worn-out railway wheels by submerged arc welding was developed. To characterize the properties of the restored wheel, dilatometric analysis of phase transformation, SEM/EDX analyses, hardness measurement, and residual stress measurement using the X-ray diffraction method were performed. Finally, wear tests with full-size wheel/rail specimens were carried out. It was confirmed that the weld metal was composed of bainitic microstructures as intended, and welding defects were not observed. The wear amount of the restored wheel was greater than that of the base material, but it was less than half of the wear depth of the weld-repaired wheel with ferritic–pearlitic microstructures. The developed process seems applicable to industry.
Keywords
bainite; submerged arc welding; hardfacing; reprofiling; railway wheel; wear
Subject
Engineering, Transportation Science and Technology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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