Influence of cobalt on the properties of casting alloys

The results of a study of the effect of modification with cobalt powder on the mechanical properties of high‑strength nodular cast iron and tin‑lead bronze are presented. It has been shown that when cobalt powder is introduced up to 0.1 %, it is evenly distributed in the metal matrix. Increasing the amount of the introduced additive revealed that cobalt is predominantly concentrated in the areas that crystallize last. The introduction of cobalt made it possible to increase the tensile strength of high‑strength cast iron and the relative elongation of bronze. The introduction of cobalt powder does not affect other mechanical properties.