Evaluation of Abrasive Wear Resistance of Structural Steels

A methodology for comparatively assessing the abrasive wear resistance of alloyed structural steels using a UMT-200 friction machine has been developed, ensuring reproducible results. Optimal test parameters have been determined. Using 40KhN2MA, 30KhGSA, 50KhMFA, 25KhGSNMA, and 25KhN3MA steels as examples, the effect of heat treatment modes (quenching and tempering at various temperatures) on abrasive wear resistance has been studied. It has been found that with an increase in hardness from 35 to 55 HRC, the wear resistance of steels increases by 5–6 times. However, with similar hardness values (47 HRC), the low-carbon silicon-containing steels (30KhGSA, 25KhGSNMA) demonstrate 20–40% higher wear resistance compared to 50KhMFA steel after high-temperature tempering. The developed method is suitable for comparative analysis of wear resistance of steels of different chemical composition after different heat treatment modes.