Study of Metal Samples in an Abrasive Environment

The paper presents the results of experimental study of the influence of heat treatment modes on the change of geometrical characteristics of the surface of steels 0.43 %C, 1.60 % Si, 0.01 % Mn, 1.1 % Cr, 0.95 % Mo, 0.08 % V, 0.05 % Nb, 0.04 % Ti (steel 40CrSi2MoV) and 65G subjected to abrasive wear. The tests were carried out on a circular soil stand simulating real conditions of operation of agricultural machinery subjected to abrasive impact of soils. A mixture of clay and sand was used as an abrasive medium, the composition of which was selected to ensure maximum compliance with the conditions of field work. The working time of the samples amounted to 160 hours, which allowed obtaining statistically significant results. The results of experimental studies showed that the intensity of weight wear of steel 40CrSi2MoV was 1.3 times lower, and linear wear - 2.9 times lower compared to the intensity of wear of steel 65G. The obtained results allow us to conclude that the use of steel 40CrSi2MoV for the manufacture of working elements of tillage machines operated under conditions of intensive abrasive wear is a promising solution for improving the wear resistance of heavily loaded parts and, consequently, increasing the service life of agricultural machinery.