Improving the Quality of Low-Melting Material Parts by the Deposition of Cast Iron Coatings

Abstract—The possibilities of coating highly loaded aluminum alloy parts with refractory cast iron are considered. The problem of preserving the geometry of parts without thermal destruction due to their coating, which creates heat-protective properties on the product surface by erosion-chemical pulse hardening with cast iron electrodes, has been solved. The mechanism of forming heat-resistant joints of parts for assemblies with high wear resistance and a low coefficient of friction of movable structural elements, which are lightened by 20–25% compared to parts made of gray cast iron, is revealed. The use of a combined erosion-chemical method of hardening, manufacturing, and restoring the operational properties of cast iron parts made it possible to halve the labor costs and the cost of parts when processing products under field conditions using minimum technological equipment.