文摘
This work studies the kinetics of the mass transfer of composite dispersion-hardened electrode materials Ti-Zr-C-binder in the process of electrospark deposition (ESD), as well as the structure, composition and properties of the deposited coatings. Titanium alloy VT3-1 and instrumental steel X12MF are used as the substrate materials (cathodes). The coatings were deposited by a universal benchmark ALIER-METAL 2002 in two different processing modes (0.06 and 0.12 J). The composition and structure of the resulting coatings were studied. The coatings formed are multiphase and are composed of carbide (Ti, Zr) C and solid solutions based on α-Ti and β-Ti (when applied to a titanium substrate) or α-Fe and γ-Fe (coatings on steel). The properties of the coatings such as thickness, continuity, microhardness, roughness, heat resistance and tribological properties were determined. The deposited coatings are characterized by a high continuity up to 100%, thickness of 10-8 μm and microhardness up to 11.8 GPa. The ESD was found to increase the wear and heat resistance of the samples on titanium alloy VT3-1 and steel X12MF. Keywords dispersion-hardened ceramic electrode materials electrospark deposition (ESD) kinetics of mass transfer phase composition structure heat resistance tribological properties