Problems of Tribology = Проблеми трибології - 2022 рік

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https://elar.khmnu.edu.ua/handle/123456789/11892

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Перегляд Problems of Tribology = Проблеми трибології - 2022 рік за Автор "Bys, S.S."

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  • Ескіз
    Документ
    Increasing the durability of cold volume stamping equipment
    (Хмельницький національний університет, 2022) Savytskyi, Y.V.; Mylko, V.V.; Bys, S.S.; Савицький, Ю.В.; Милько, В.В.; Бись, С.С.
    The work examines the process of cold three-dimensional stamping, which is a very effective method of manufacturing blanks for machine parts. When using cold extrusion, high-cost stamping equipment wears out quickly and defects appear on the finished products. The development of rational technological processes of stamping helps to solve the tasks of expanding the possibilities of cold extrusion by reducing the specific force perceived by the punches, finding the optimal shape of the punch, and testing different grades of steel in order to select them according to the best operational properties. The process of radial extrusion was theoretically investigated and its mathematical model was built based on the energy method, which allows for the analysis of the force mode of extrusion and the kinematics of metal flow, to determine the relative specific force of deformation, to construct the velocity fields for different metal flow zones, and already from these data to calculate the total force deformations The resolution of the model made it possible to formulate recommendations for reducing production defects and increasing the durability of die equipment.
  • Ескіз
    Документ
    Nanostructural glasscomposite self-lubricant coatings
    (Хмельницький національний університет, 2022) Fialko, N.M.; Shchepetov, V.V.; Kharchenko, S.D.; Kovtun, S.I.; Hladkyi, Ya.N.; Bys, S.S.; Фіалко, Н.М.; Щепетов, В.В; Харченко, С.Д.; Ковтун, І.І.; Г ладкий, Я.М.; Бись, С.С.
    The results of the study of glass-composite nanostructured self-lubricating coatings are presented. The structural components of these coatings significantly affect the graphitization process and provide an antifriction surface layer of α-graphite. The formation of this layer makes it possible to significantly minimize the contact parameters in the friction region. A significant effect of aluminoborosilicate in the form of a glass phase on the tribological properties of coatings is noted. An increase in adhesive strength is achieved by forming a surface layer of glassy sodium silicate. The presence of near-surface particles in the graphite layer does not affect the tribotechnical characteristics of the coatings. The developed glass-composite nanostructured self- lubricating coatings have high antifriction characteristics throughout the entire load- speed range.