Abstract
It is shown that in conditions of significant increase of railway transport speeds, requirements for the safety of the friction–mechanical “wheel–rail” subsystem are increased. In order to solve the above problem, a method is proposed for metal plating “wheel–rail” friction surfaces by applying thin films of soft metal, for example, aluminum, with different values of hardness, on surfaces of rolling wheels and wheel ridges of locomotives. On the basis of quantum-chemical calculations, it has been proved that metal plating of the friction surfaces of the “wheel–rail” system provides a chemical bond between wheel steel and aluminum and the formation of a strong protective film. The performed bench tests of the “wheel–rail” model friction subsystem by methods of tribospectration identification of friction processes and dynamic monitoring of changes in elastic-dissipative bonds confirmed the formation of stable dynamic bonds in friction contact. The results of the research formed the basis of the creation of the algorithm of axial control of “wheel–rail” interaction processes at realization of forces of longitudinal and transverse creep, as well as at optimization of modes of vibrodynamic metal plating working surfaces of other tribosystems, of vehicles operating in heavy load–speed conditions of operation.
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Funding
This work was carried out in the framework of the federal target program “Research and Development in Priority Areas of Development of Scientific and Technological Complex of Russia for 2014–2020” with financial support from the state represented by the Ministry of Science and Higher Education of Russia, project no. RFMEFI60718X0203.
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Translated by Sh. Galyaltdinov
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Shapovalov, V.V., Migal, Y.F., Ozyabkin, A.L. et al. Metal Plating of Friction Surfaces of the “Wheel–Rail” Pair. J. Frict. Wear 41, 338–346 (2020). https://doi.org/10.3103/S1068366620040121
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DOI: https://doi.org/10.3103/S1068366620040121