Increased durability parts of tillage machines, adapted to soils of different types

Purpose. Justification of rational parameters of hardening of the working bodies of tillage machines by the method of electro arc processing. Methods. The experimental, mathematical and statistical, monographic. Results. The technology of local hardfacing, which improves the wear resistance of the surfaces of the parts of modification with the use of electro arc processing and with additional point hardfacing with the use of variations in processing modes, various technological methods and materials for adaptation to specific operating conditions. Conclusions 1.According to the results of theoretical studies, the heat balance of the process of electrical contact processing was determined, which allows to determine the most significant factors affecting the energy performance of the process, namely, the controlled voltage U of the arc process of electrical contact processing. 2.According to the results of experimental studies, rational values of the controlled voltage U in the process of electro arc processing within 35–55 V were established, which ensures surface roughness in the range from 0.4 to 1.0 mm. Keywords: electro arc processing, hardfacing, heat balance, parts of tillage machines, regimes, roughness, wear resistance.