INVESTIGATION OF THE INFLUENCE OF COPPER POWDERS ADDED TO PLASTIC LUBRICANTS ON THE SELECTIVE TRANSFER MODE AND TRIBOTECHNICAL CHARACTERISTICS
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- Published: Thursday, 25 June 2020 08:19
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A.A. GULIYEV, S.S. HUSEYNOV, A.V. SHARIFOVA,
Azerbaijan State Oil and Industry University
Abstract: Analysis of the results of experimental studies shows that the most effective filler is the one with the restoration of which a new surface layer is formed on the friction surface, which is protected by a stronger adsorbed layer. In this case, the friction unit operates in selective transfer mode. There is a so-called multilayer lubricant consisting of a film of copper alloy particles, copper powders (Cu, Cu-C, Cu+(Cu-C)) and an adsorbed PSM layer, the void between which consists of a mixture of graphite and
lubricants. In this case, there may be a decrease in the intensity of wear of the copper alloy sample and the formation of a film on the surface of the steel sample, which has a complex structure. Under these lubrication conditions, the anti-wear and anti-friction properties of the friction pairs and the load capacity of the friction unit are increased. So, the mechanism of action of the lubricant manifests itself in the formation of new tribochemical transformations in the oil during operation on the friction surfaces and appears in the form of soft films that help to increase wear resistance and reduce friction forces.
Keywords: friction units, friction pair, bronze-steel, copper powder and powdered copper graphite, plastic lubricants, fillers, selective transfer, complex coating, tribotechnical parameters.