Physico-chemical and tribological properties of nitrogened layers of structural steel

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Ескіз
Дата
2021
Автори
Skyba, Mykola Yegorovych
Stechyshyn, Miroslav Stepanovich
Stechyshyna, Nadiya Myroslavivna
Martynyuk, Andriy Vitaliyovych
Lyukhovets, Volodymyr Vasyliovych
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Видавець
Khmelnytskyi National University
Анотація
The presented work is a continuation of the problem of solving practical and theoretical principles of vacuum-diffusion gas-discharge processes, in which the mechanisms of processes of formation of modified surface layers of metals under the interaction of regime (temperature, medium saturation, medium pressure in gas-discharge chamber and saturation time) and energy (current density) and voltage at the electrodes of the discharge chamber) parameters. On the basis of the obtained experimental data it is planned to formulate the position of practical use of a fundamentally new technological process with optimization of combining its mode and autonomous saturation parameters, which would fully correspond to the formation on the surface of structures corresponding to increasing reliability and durability of machine parts. The authors rely on the developed fundamentally new energy model of the nitriding process in the glow discharge, the main feature of which is the priority of those subprocesses in strengthening the surface layers of metals, which in specific operating conditions of parts are most appropriate [1]. Analysis of the literature [2, 3, 4] showed that all known theoretical models of ionic nitriding processes are largely hypothetical, because the hypotheses underlying them are not always and not fully confirmed experimentally. A number of such models do not have an analytical justification, there are no criteria for optimizing nitrided surfaces, and thus methods of managing the nitriding process in order to achieve the required performance characteristics. The accumulation of a large amount of technological data, which do not have a generalized theoretical basis, not only does not contribute to the development of practical application of ion-plasma hardening of parts, but often leads to opposite consequences, because the accumulated results do not take into account real operating conditions. In the planned cycle of works, fundamentally new provisions of the theory of diffusion gas-discharge processes of ionic nitriding of metals are formed, which are based on the priority of energy approaches [1]. From such positions theoretical processes of diffusion gas-discharge methods of ionic nitriding were not considered by domestic and foreign researchers, but they open absolutely new opportunities of studying of the thin mechanism of the phenomena and their practical application in the field of strengthening of metal surfaces.
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Бібліографічний опис
Physico-chemical and tribological properties of nitrogened layers of structural steel / M. Skyba, M. Stechyshyn, N. Stechyshyna, A. Martynyuk, V. Lyukhovets // Actual problems of modern science : Monograph / ed. by Matiukh S., Skyba M., Musial J., Polishchuk O. – Khmelnytskyi : KHNU, 2021. – P. 488-499.