Generalized Assess of Wear Resistance of Polymer Materials for Metal-Polymer Sliding Bearings

The method of system triboanalysis is considered in order to select optimally antifrictional polymer materials (PMs) for metal-polymer plain bearings. It includes the model tribotesting of the PMs and calculation of generalized characteristics of their wear resistance depending on specific friction forces. The method is used to assess the wear resistance of a large number of existing PMs based on polyamide, polytetrafluoroethylene, polyacetal, polyethylene terephthalate and polyetheretherketone. Experimental studies of the specified PM groups were performed on a tribometer operating according to the “pin-on-disc” scheme. The obtained wear resistance characteristics are the basic parameters of a well-known mathematical model describing the kinetics of material wear during sliding friction and an analytical method for calculating metal-polymer plain bearings. The research results are presented in the form of diagrams covering a wide range of specific friction forces, which allows for a visual comparison of antifrictional PMs by wear resistance. The friction patterns of PM in a pair with steel 45 were established, the qualitative and quantitative influence of the type of fillers on the wear resistance of the polymeric materials was analyzed. In each group of PMs under consideration, a composite with maximum wear resistance is noted in comparison with the base (unfilled) polymer.

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