Investigation of Dependence of Hardness of Grain–fertilizer–grass Seeder Chisel on Chemical Composition of the Clad Layer

This research work considers the comparison of composite complex alloys as an electrode for hardening of the working body of the seeder – chisel. The task of hardening is to increase the hardness of the material, contributing to the reduction of abrasive wear during the impact of the working body with the soil. According to the results of microstructural analysis of experimental samples were revealed that the initial microstructure with coarse-grained pearlite, surrounded by ferrite after hardening the size of martensitic needles decreases. Measurement of hardness on the Vickers scale allowed to obtain a graphical dependence of hardness on the chemical composition of the alloy, and it was found that the hardness of cladding with electrode T590 with four component alloy Cr25Si2MnB has the highest value of 548÷815HV. Due to the presence of nickel (CS-1) in the composition in compositionally complex alloys, the cost of the hardened part is more expensive, so it was recommended to replace with a four component boron-based alloy (T590).