Application of pyrolytic chromium-carbide coatings in friction units of machines

Васин, В. А.; Крит, Б. Л.; Nevrovskii, V. A.; Somov, O. V.; Morozova, N. V.

doi:10.3103/s1068375516050136

Cited by 4 publications

(1 citation statement)

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“…Относительная простота как самого процесса, так и соответствующего оборудования побуждает исследователей, работающих в совершенно разных областях, изготавливать такое оборудование для своих целей, например для нанесения ПКХП на уплотняющие и маслосъемные кольца двигателей внутреннего сгорания производительностью 120 колец в час [5][6][7]. Использование технологии ПКХП в узлах трения описано авторами [8]. Большой объем исследований, посвященных как собственно технологии, так и особенно свойствам ПКХП на внутренней поверхности труб с большим аспектным отношением, выполнен за последние годы французскими учеными [9][10][11][12][13].…”

Section: Introductionunclassified

Optimization of pyrolytic chromium carbide coating properties

Schitov

Лозован

2020

Izv. VUZ. Poroshk. Met.

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The paper discusses ways to optimize the properties of pyrolytic chromium carbide coatings (PCCC) for different industries. PCCC applications include protecting surfaces of different parts and units made of various materials against corrosion, sticking, high temperatures, and various types of wear. Such versatility of PCCCs is explained partly by the peculiarities of their structure that is generally a «superlattice» of alternating relatively hard and soft layers of different composition and, accordingly, functional characteristics such as microhardness and Young modulus. These structures with specific periods and layer thickness ratios correspond to the maximum quality criterion of the optimal control theory (OCT) problem, an inverse problem stated on the class of solutions for a direct problem simulating specific interaction, e.g. abrasive wear. At the same time, the direct problem itself, e.g. an indentation description, is an incorrect inverse problem of mathematical physics, and it needs its own optimal strategy to be solved. This results in a hierarchy of optimization algorithms that can be used to obtain best PCCC functional properties. When an abrasive-wear type direct problem cannot be formalized, it is suggested to use a computational-experimental method elaborated by the authors that is also based on OCT. The main focus is on the improvement of the PCCC deposition technology for every specific application using the optimal control theory. To obtain PCCCs that meet these conditions, it is required to take into account the physical and chemical features of precursor pyrolysis as well as the effect of different additives or catalysts in the process development.

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Section: Introductionunclassified

Optimization of pyrolytic chromium carbide coating properties

Schitov

Лозован

2020

Izv. VUZ. Poroshk. Met.

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Modeling wear process of oil scraper piston rings with pyrolytic chromium coating

Maksarov

Krasnyy

Klochkov

2021

J. Phys.: Conf. Ser.

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The modern designs of oil scraper piston rings of internal combustion engines, including box-section rings with an expander are considered. Pyrolytic carbide of chrome coating of the working edges of oil scraper piston rings are proposed as a possible alternative to galvanic chromium coating. The results of model tribotechnical samples tests, which showed the effectiveness of pyrolytic chromium carbide plating in comparison with galvanic coating with chromium, are presented. Under the same conditions the wear of samples with pyrolytic chromium plating is 3.5 … 4 times less. It is shown that pyrolytic carbide chromium coating is promising for piston oil scraper rings.

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Optimization of Characteristics of Pyrolytic Chromium Carbide Coatings

Schitov

Лозован

2020

Russ. J. Non-ferrous Metals

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Application of pyrolytic chromium-carbide coatings in friction units of machines

Cited by 4 publications

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Optimization of pyrolytic chromium carbide coating properties

Optimization of pyrolytic chromium carbide coating properties

Modeling wear process of oil scraper piston rings with pyrolytic chromium coating

Optimization of Characteristics of Pyrolytic Chromium Carbide Coatings

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