Next Article in Journal
On Singular Perturbation of Neutron Point Kinetics in the Dynamic Model of a PWR Nuclear Power Plant
Previous Article in Journal
Making Japenese Ukiyo-e Art 3D in Real-Time
Article

Railway Vehicle Wheel Restoration by Submerged Arc Welding and Its Characterization

1
Advanced Railroad Vehicle Division, Korea Railroad Research Institute, Uiwang-si 16105, Korea
2
Asia-Tech Co., Ltd., Jecheon-si 27159, Korea
*
Author to whom correspondence should be addressed.
Received: 11 April 2019 / Accepted: 12 April 2019 / Published: 14 May 2020
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. View Full-Text
Keywords: bainite; submerged arc welding; hardfacing; reprofiling; railway wheel; wear bainite; submerged arc welding; hardfacing; reprofiling; railway wheel; wear
Show Figures

Figure 1

MDPI and ACS Style

Coo, B.-C.; Lee, Y.-J. Railway Vehicle Wheel Restoration by Submerged Arc Welding and Its Characterization. Sci 2020, 2, 33. https://doi.org/10.3390/sci2020033

AMA Style

Coo B-C, Lee Y-J. Railway Vehicle Wheel Restoration by Submerged Arc Welding and Its Characterization. Sci. 2020; 2(2):33. https://doi.org/10.3390/sci2020033

Chicago/Turabian Style

Coo, Byeong-Choo, and Young-Jin Lee. 2020. "Railway Vehicle Wheel Restoration by Submerged Arc Welding and Its Characterization" Sci 2, no. 2: 33. https://doi.org/10.3390/sci2020033

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop