Problems of Tribology = Проблеми трибології - 2025 рік

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https://elar.khmnu.edu.ua/handle/123456789/18103

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Перегляд Problems of Tribology = Проблеми трибології - 2025 рік за Ключові слова "friction"

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  • Ескіз
    Документ
    Improving the wear resistance of guides: tribological analysis, surface texture and lubricants
    (Хмельницький національний університет, 2025) Dykha, O.V.; Dytyniuk, V.O.; Kovtun, O.S.; Fasolia, V.O.; Hetman, M.V.
    The article considers the main failure modes of guides, in particular wear and contact fatigue, which depend on friction between contact surfaces. The influence of tribological parameters, in particular surface roughness and lubricating structures, on the operational characteristics of linear guides is studied. Particular attention is paid to the dynamic behavior of guides, which determines the accuracy and stability of mechanical systems. To predict wear, mathematical models based on the Archard and Hertz theories were used, which allow estimating load distribution and contact deformations. The influence of lubricants, in particular molybdenum disulfide and hexagonal boron nitride, on reducing the friction coefficient and improving antifriction properties was separately studied. The prospects for using new materials, such as cubic boron nitride, to increase the wear resistance of guides are considered. Methods for optimizing the load between rolling elements, which contributes to increasing the durability of guides, are proposed. The results obtained can be used to improve the designs of high-precision mechanical systems and reduce operating costs.
  • Ескіз
    Документ
    The influence of hydrogen saturation on the wear mechanism of steel
    (Хмельницький національний університет, 2025) Shchepetov, V.V.; Bys, S.S.; Byalik, M.R.; Medvedchuk, V.Yu.; Bys, Ya.S.
    The tribological characteristics of hydrogenated steel 60C2 with different structural states were compared with the obtained results of studies of friction surfaces by physicochemical methods, which allowed us to draw a conclusion about the relationship between friction and wear indicators with the processes occurring on the surface of the material during friction, and the significant influence of hydrogen present in the contact zone on them. It was proven that during friction on the contact surface of hydrogenated steel 60C2, regardless of its structural state, the process of formation of secondary structures occurs, which determine the process of friction and wear of the material. Reduction of the wear intensity of steel 60C2 with a tempered martensite structure (300C) is accompanied by the formation of secondary structures on the surface, which have a higher resistance and shield the base material from direct contact and destruction. In addition, the saturation of the material with hydrogen changes the nature and mechanism of formation of secondary structures, which in turn leads to a change in the mechanism of friction and wear of the material.