MECHANICAL CHARACTERISTICS OF СLADED LAYERS OF CORE WIRE FOR MECHANICAL VIBRATION OF PARTS

Abstract

For the first time, regularities of the influence of the direction and the amplitude of the mechanical vibration of the substrate on the structure-phase composition, morphology and the dimensions of the reinforcing inclusions in the structure of the layers deposited with economically verified CW-Fe-Cr-B-C under the flux layer were established. It is established that mechanical vibration changes the phase composition of the deposited layer, the FeCrB phase decreases, and the FeCr₂B phase increases. The parameters of vibration of the substrate during surfacing of its surface have been optimized to modify the structure of the weld metal and to achieve maximum wear resistance. For the first time, it was proposed to grind the boride inclusions in the structure of the deposited layers by adding to the composition of the charge charge of the Fe-Cr-B-C PAM powder (60% Al 40% Mg). It is established that after adding 1 wt. adding 1% by weight of powder, dispersion of the strengthening boride phase is increased by 7 times. It was first established that in the presence of CW 80Cr20B3Ti powder in the structure of the deposited layer, fine-dispersed (up to 1 μm) inclusion of complexly-substituted nitrides, which significantly increase the microhardness (1.2 times) and, respectively, wear resistance (1.5 times) of welded layers.