Determining features in the wear resistance characteristics of tribocompounds with a textured hole surface under conditions of boundary friction

Authors

DOI:

https://doi.org/10.15587/1729-4061.2023.291785

Keywords:

wear resistance, coefficient of friction, textured surface, hole, boundary friction, regeneration of lubricating film, lubricant droplet, mathematical model

Abstract

The influence of surface texture in the form of pits on the wear resistance of tribocompounds under conditions of limit friction was investigated. At the first stage of research, the mechanism of lubricant behavior between the contacting surfaces and inside the holes was modeled. The limiting condition of the rotation frequency of the sample (n>27) was established, under which a drop of lubricant "leaves" the hole in the upper position of the sample and remains in the space between the sample and the surface of the counterbody, ensuring the regeneration of the boundary lubricating film on the surface of the tribocontact when it is destroyed. When the rotation frequency of the sample is reduced (n<27), the lubricant droplet remains in the hole and does not affect the processes of the boundary lubricant film. At the second stage, experimental studies of tribocombinations with a textured hole surface under conditions of extreme friction were carried out. It was established that the high wear resistance of the textured hole surfaces is provided by the high protective effect of the texture, as well as the high efficiency of the marginal lubricating film. It has been proven that the strengthening of the surface texture by the method of ion-plasma thermocyclic nitriding additionally increases the wear resistance by 1.7 times due to the high protective effect of surface nitrided layers and their high hardness (up to 9500 MPa). This strengthens the effect of inhibiting the occurrence of defects in the surface layers of tribocontact, ensures a high rate of wetting of the places of actual contact of triboconnections, and speeds up the process of regeneration of the boundary lubricating film. Research results can be used to modify the surface layer of heavily loaded parts operating under extreme operating conditions with limited supply of lubricant under various types of friction and wear

Author Biographies

Volodymyr Marchuk, National Aviation University

Doctor of Technical Sciences, Professor

Department of Logistics

Myroslav Kindrachuk, National Aviation University

Doctor of Technical Sciences, Professor, Corresponding Member of the National Academy of Sciences of Ukraine

Departments of Applied Mechanics and Materials Engineering

Oleh Harmash, National Aviation University

PhD, Associate Professor

Department of Logistics

Volodymyr Kharchenko, National Aviation University

Head of Laboratory

Department of Applied Mechanics and Materials Engineering

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Determining features in the wear resistance characteristics of tribocompounds with a textured hole surface under conditions of boundary friction

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Published

2023-12-27

How to Cite

Marchuk, V., Kindrachuk, M., Harmash, O., & Kharchenko, V. (2023). Determining features in the wear resistance characteristics of tribocompounds with a textured hole surface under conditions of boundary friction. Eastern-European Journal of Enterprise Technologies, 6(12 (126), 22–29. https://doi.org/10.15587/1729-4061.2023.291785

Issue

Vol. 6 No. 12 (126) (2023): Materials Science

Section

Materials Science

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Copyright (c) 2023 Volodymyr Marchuk, Myroslav Kindrachuk, Oleh Harmash, Volodymyr Kharchenko

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