Refining and modification of alloys by nanostructured recycling materials

The current stage of metallurgy development is aimed at creating material-efficient and energy-saving technologies providing the integrated use of raw materials. In this regard, much attention is paid to the usage of recycling nanostructured materials, such as finely divided diamond powder (a co-product of synthetic diamonds production) and small fraction wastes of electrodes’ production in the process of alloy preparation. Thus, the methods of refining and modification of cast iron and aluminum alloys of these materials have been developed. The method for refining and modification of cast iron eliminates the pyroeffect and improves the physical and mechanical properties of castings due to grain refinement and the reduction of chilling effect at melt crystallization stage. The modification of aluminum alloys by refractory particles of nanostructured diamond powder leads to the refinement of the structural components, and the conditions for the refinement of strengthening intermetallic compounds during the subsequent heat treatment of the castings are created. As a result, the alloy castability as well as physical and mechanical properties of castings are significantly improved. The developed methods of refining and modification of alloys can be used in Russian and foreign foundries in the manufacture of products for the mechanical engineering, metallurgy, aviation, and other industries.