Abstract
UDC 669.15-194:621.9.048.4
DOI htps://doi.org/10.5281/zenodo.1228873
The work is devoted to the investigation of the influence of the electric spark discharge parameters and electrode materials based on tungsten carbide for electric spark alloying using chromium carbide nanopowder additives, on the physico-chemical and operational charac-teristics of the coating surface. It is determined that an increase in the surface roughness occurs with an increase in the duration of an electric spark discharge from 20 to 80 μs with a standard WC-8% Co hard alloy. Introduction of the 1–5 wt.% nanopowder of the grain growth inhibitor improves the physicochemical properties of coatings, reduces surface roughness and increases wear resistance.
Keywords: electrospark alloying, electrode materials, coatings, tungsten carbide, chromium carbide nano-powder, grain growth inhibitor, roughness, micro abrasive wear, impedance spectroscopy.