Analysis of Wear Resistance of Functional Coating in Conditions of Abrasive Wear of Geometrically Complicated Friction Part

Zhachkin, Sergey Yu.; Pukhov, Evgeniy V.; Trifonov, Grigoriy I.; Komarov, Yan V.; Zagoruyko, Kirill V.

doi:10.17238/issn2071-2243.2019.3.32

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The most common method of anticorrosion protection of theimplements' outside surfaces in preparing them for storage is a preservationof them with various protective materials.For these purposes, viscous lubrication, conservation oils and greases, protective wax dispersions, film-forming inhibited petroleum compositions, gasoline-bituminous compositions, oil-soluble and anticorrosive additives are used.The main criteria for the selection of preservation materials are the corrosiveness of the environment, the way of storage, the condition of the protected surface, the duration of protection, the application processand the need for depreservation [2,9,15].…”

Section: Resultsmentioning

confidence: 99%

The mechanical life of implements operating in corrosive service

et al. 2021

View full text Add to dashboard Cite

In severe operating conditions, there are machines for the preparation and introduction of mineral and organic fertilizers, herbicides, pesticides. They fail in order after two or three years due to corrosion and corrosion-mechanical wear. Under these conditions, the main thing is not to protect individual details, but the protection of the machine as a whole. Disclosure of the mechanism and patterns of corrosion-mechanical wear and corrosion of structural materials in aggressive environments made it possible to scientifically substantiate the most effective ways to increase the service life of machines at the stages of design, manufacturing and operation. Passive working bodies (frame, body, tank) polymer and gummed coatings are reliably protected from corrosion. Corrosion damage to the details of agricultural machines during storage. The illustrated surfaces of the working bodies of plows, seeders, cultivators, disk harrows and other agricultural machines in the storage period are oxidized and coated with rust. In some cases, it appears due to the destruction of the protective film of paint in others - due to violation of the storage rules. The lower parts of agricultural machines made of simple carbonistic structural and unfounded steels, in contrast to parts remote from the soil and no contact with it, corroded intensively.

show abstract

Section: Resultsmentioning

confidence: 99%

The mechanical life of implements operating in corrosive service

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Как показывает практика [7][8][9], различная грануляция компонентов, входящих в порошковые смеси, не гарантирует равномерного их распределения в легированном покрытии, что может привести к повышению степени возникновения остаточных напряжений в покрытии, а также к снижению стойкости к абразивному износу и ударным нагрузкам. С целью устранения указанных недостатков было принято решение произвести теоретический подбор рационального состава композитного материала для нанесения плазменным напылением на винтовую поверхность шнека с целью его восстановления (рисунок 1).…”

Section: Introductionunclassified

“…Основываясь на формулах (1), (3) (6), и введенных упрощений (7), выводим уравнения для определения остаточных напряжений на винтовой σ 1 и цилиндрической σ 2 поверхностях шнека, при этом учтем, что толщина цилиндрической поверхности шнека будет равна его диаметру d:…”

Section: Introductionunclassified

Study of quality criteria for two-phase iron-based composite coatings formed by plasma spraying

Zhachkin

Trifonov

Егорова

et al. 2021

Vestn. Voronež. gos. univ. inž. tehnol.

View full text Add to dashboard Cite

The increasing relevance in the field of repair and restoration of machines and mechanisms is acquiring gas-thermal methods of applying functional coatings to the working surfaces of parts of machine assemblies. The purpose of gas-thermal coating methods is to provide and obtain special physical and mechanical properties of the surface of the part, as well as to restore worn-out components and mechanisms after their long-term and intensive operation. Plasma spraying of composite coatings is an effective method of gas-thermal treatment of the surface of a part. In this paper, a study was conducted on the optimal selection of material for plasma spraying of a part, taking into account its operational features and types of wear of working surfaces. In particular, the operating conditions of the screw of the conveying conveyor are analyzed. The technological features of the application of composite materials by plasma spraying technology are considered. The theoretical selection of a two-phase dispersed-filled composite for application to the working surfaces of the screw in order to restore and harden it has been carried out. Studies and analysis of one of the main indicators of the quality of the formed coating after plasma spraying – the magnitude of the resulting residual stresses (stretching and compression) have been carried out. Taking as a basis the kinematic modes and geometry features of the working surfaces of the screw, as well as the criteria for the formation of the thickness of the sprayed layer, the calculation equations for determining the residual stresses arising on the screw and cylindrical surfaces of the screw of the conveying conveyor are obtained. It is concluded that in order to achieve the required physical and mechanical properties of the coating, the volume fraction of the filler in the matrix of the PG-SR4 composite powder should be in the range of 20–25%. Therefore, it is possible to use in practice a particulate-filled composite of the NiСrВSiFе type with 20–25% reinforcing TiC filler particles in order to restore parts of machines and mechanisms.

show abstract