Electrospark deposition of tungsten carbide powder on titanium alloy Ti6Al4V

Titanium alloys are attracting the attention of researchers and engineers because their unique combination high specific strength, corrosion resistance biocompatibility, but they characterized by wear. Therefore, study new methods for making protective coatings on titanium is relevant. A mixture granules with tungsten carbide powder was used to prepare alloy Ti6Al4V method electrospark deposition. Three mixtures a content 2.1, 4.1 6.0 vol.% were prepared. According data X-ray analysis, it found that following phases observed in composition coatings: WC, W2C, W, αTi β-(W, Ti)C1−x. Carbides (W, Ti)C1−x metallic formed as result decarburization WC upon its interaction molten under conditions an electric discharge. Large inclusions surrounded Ti-W-C binder microstructure coatings. energy dispersive concentrations carbon decreased when scanning from surface layers coating substrate. The average values microhardness increased 7.9 9.2 GPa increase concentration granules. friction coefficients range 0.33 – 0.48, which 35 ± 3 % lower than alloy. Tests wear dry mode at loads 25 70 N showed rate ranged 0.38 ×10−5 1.68 mm3 / Nm. best both demonstrated deposited addition make possible up 18 times. Thus, prospect deposition cermet enhanced mechanical properties using mixed shown.