Comparison of the Influence of High-Energy Surface Treatment Methods on Friction and Wear of a 30KhGSN2A Steel (CSN 16532)-30KhGSN2A Steel (CSN 16532) Pair

In this paper, we present the evaluation results of the tribotechnical characteristics of a dry friction pair of 30KhGSN2A steel (CSN 16532)-30KhGSN2A steel (CSN 16532) at pressures up to 350 MPa using KE-4 and UMT-1 laboratory friction machines, as well as a special stand simulating a real hinge-bolted connection. The surface of the steel shafts was processed by electrospark alloying (coatings were made of BrAZhMts10-3-1.5 and BrMtsF3 bronzes) and ion implantation (a copper ion beam was used). It is shown that, the minimal values of the friction coefficient (similar to 0.10) are observed for a pair with a BrMtsF3-6 coating under laboratory test conditions at 150-200 MPa and (similar to 0.13) for a pair with a BrA-ZhMts10-3-1.5 coating at 200-250 MPa; wear is reduced by 1.5-2 times. Under the stand test conditions, it was obtained that the increase in the wear resistance of steel is 1.5, 1.7, and 5.7 times and the decrease in the friction coefficient is 1.3, 1.5, and 3.1 times for friction pairs with a coating of BrA-ZhMts10-3-1.5, BrMtsF3-6, and copper, respectively. An improvement of tribotechnical parameters of steel friction pairs is largely due to the "long-range action" effect that manifests itself during high-energy treatments.