Sulphurizing of Metal Surfaces by Electrospark-Discharge Alloying. Pt. 2: Tribological Properties of Electrospark Depositing Sulphur-Containing Coating
TARELNYK V.B.$^1$, HAPONOVA O.P.$^{2,3}$, TARELNYK N.V.$^1$, and KONOPLIANCHENKO Ye.V.$^1$
$^1$Sumy National Agrarian University, 160 Herasyma Kondratieva Str., 40021 Sumy, Ukraine
$^2$Sumy State University, 116 Kharkivska Str., 40007 Sumy, Ukraine
$^3$Institute of Fundamental Technological Research, Polish Academy of Sciences, 5В Pawińskiego Str., 02-016 Warsaw, Poland
Received 25.10.2024, Final version 05.05.2025
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Abstract
The essence and technological characteristics of the electrospark alloying (ESA) process, its advantages and disadvantages have been considered in order to use it to improve the tribological properties of bronze and steel parts. A generalization of the available data and results in the literature concerned with the ESA process has been made. Based on the published data, a comparative analysis of various methods for forming combined electrospark coatings (CESC) on bronzes, which include sulphur, the influence of the mode parameters and the compositions of the CESC on the microstructure, mechanical and tribological properties are represented. The methods for practical application in production have been proposed. The methods for forming the self-lubricating electrospark coatings containing molybdenum disulphide on steel substrates have been investigated. There have been represented physical and mechanical characteristics of the coatings, which had been obtained using different strategies, as well as there has been disclosed the nature of their changes depending on the technological parameters of the ESA modes and the types of the starting materials for the anode and cathode, and on the compositions of the environment wherein the ESA process takes place. There have been given the summarized data on the tribological properties of the coatings, which had been obtained on some steel grades using different electrode materials and modes of operation. As demonstrated, the ESA method can be successfully used to reduce the coefficient of friction and to increase the wear resistance of bronze and steel surfaces. There have been specified the proposed electrode materials and ESA process parameters for modifying the surfaces made of some bronzes and steels.
Keywords: technology, electrospark alloying, coating, microstructure, tribotechnical properties.
DOI: https://doi.org/10.15407/ufm.26.02.***
Citation: V.B. Tarelnyk, O.P. Haponova, N.V. Tarelnyk, and Ye.V. Konoplianchenko, Sulphurizing of Metal Surfaces by Electrospark-Discharge Alloying. Pt. 2: Tribological Properties of Electrospark Depositing Sulphur-Containing Coating, Progress in Physics of Metals, 26, No. 2: ***–*** (2025)