Structure and properties of alloyed cast alloys of the Co-TiC system

This article presents data on the physical properties (melting point, phase composition, microstructure) of alloys in the Co-TiC system with a titanium carbide content of 10, 12 and 15 wt. %. Alloys were doped with aluminum, tungsten, chromium and rhenium. It was shown that the structure of the alloys in the alloyed cast state is slightly hypereutectic, with the presence of carbide in the form of primary grains and a plate-like fibrous eutectic surrounding them. The components of the eutectic include a solid solution of alloying elements in cobalt and highly dispersed titanium carbide grains. The eutectic melting temperature (solidus) lies in the range of 1330–1340 °C, while the primary carbide grains melt at approximately 1500 °C. The phase composition of the alloys is stable across the entire temperature range. The studied properties allow the alloyed Co-TiC eutectic alloys to be considered as natural composites with promising potential as high-temperature wear-resistant materials for mechanical engineering. The results obtained are important for the development of alloyed eutectic alloys of the Co-TiC system for use as the basis of high-temperature wear-resistant and heat-resistant materials for mechanical engineering.