Increasing Service Life of a Railway Wheel with Surface Hardening Technology
https://doi.org/10.30932/1992-3252-2021-19-1-48-59
Abstract
The article presents surface hardening technology as applied to solid-rolled wheels of rolling stock. The obtained results of the theoretical study on the process of strengthening the metal of the wheel will make it possible to develop scientifically grounded technological and technical solutions to prevent formation and development of defects on the rolling surface, as well as to eliminate them during maintenance.
The objective of this work is to identify the optimal method for surface hardening of a railway wheel with defects.
At present, the issue of extending service life of elements and critical parts of rolling stock is becoming increasingly acute. Due to the limited economic feasibility and limited availability of existing production technologies, it becomes necessary to create a new material modified with nanoclusters and hardened with surfactants.
Nanoclusters have high plasticity and hardness values. To determine the hardness value of nanomaterials, the Vickers hardness test method is used, in which hardness is determined by the size of the area of the indentation after removing the load from the pyramid shaped diamond.
Superplasticity is observed in nanostructures. For nickel and nickel-aluminium alloy NiAl3, low-temperature superplasticity is observed in the temperature range 450–470°C, which is three times lower than their melting point.
About the Author
T. G. Bunkova
Omsk State Transport University
Russian Federation
Russian Federation
Bunkova, Tamara G. – Senior Lecturer at the Department of Wagons and Wagon Facilities, Engineer at the Department of Transport Mechanical Engineering Technology and Rolling Stock Repairs
Omsk
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Review
For citations:
Bunkova T.G. Increasing Service Life of a Railway Wheel with Surface Hardening Technology. World of Transport and Transportation. 2021;19(1):48-59. https://doi.org/10.30932/1992-3252-2021-19-1-48-59
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