Zusin A. Development of surfacing materials and technologies of metal deposition with metastable austenite

Object - the processes and mechanisms that occur during the formation of metastable weld metal. Item - chemical, structural composition and properties is fused-foot metal during surfacing flux cored wire submerged arc. Methods - metallography, chemical and X-ray analysis of the weld metal, the measurement firm-sti, comprehensive tests on wear resistance under dry friction, abrasion, impact-abrasive wear, mathematical modeling of weld metal systems we Fe-Cr-Mn-Ni-N. Dissertation is devoted to the development of coating materials to improve the durability of components operating in conditions of dry friction of metal on metal, abrasive and impact-abrasive wear. Systemic study of wear resistance of deposited metal of Fe-Cr-Mn-Ni-N in conditions of dry friction of metal on metal, abrasive and impact-abrasive wear at different tempering temperatures. Fitted regression of hardness, wear resistance under dry friction, abrasion and impact wear on the chemical composition of the weld metal, which was the basis for the creation of surfacing materials. The proposed method of choosing the composition of the flux cored wires for welding austenitic wear for different conditions. Such coating materials have been developed: a flux for welding of austenitic wire with increasing ferrochrome and ferromanganese, and flux with increased carbon content; designed composition of flux, which reduces the cost of austenite during surfacing flux cored wires 40%; developed cored wire containing nitrogen, thus reducing the amount of scarce and expensive nickel in the weld metal at the three times.