Yevdokymov A. Materials and technologies of arc surfacing of bimetallic sheets of increased wear resistance

The subject of the study is the composition, structure and mechanical properties of surfacing layers that are subject to intensive wear when in contact with metal without lubrication, abrasive and gas-abrasive flow. The object of the research is arc surfacing and the processes that occur during the interaction of the metal melt with dispersed particles of powder surfacing materials before friction. The purpose of the research is to create powder surfacing materials and develop a technology for arc surfacing of sheet blanks for the manufacture or repair of parts of contact friction pairs. Research objectives: Analyze the nature and identify patterns of wear of parts, based on a literature review, propose methods and techniques for increasing the stability of the working surfaces of parts Propose the optimal composition of the core of the surfacing powder material (strip/wire) To conduct a study of the influence of the chemical composition of the surfacing layers on the tendency of the metal to form pores and cracks. To study the patterns of the influence of the technological parameters of the arc surfacing process on the conditions for the formation of the structure and properties of the deposited layers. To develop and implement technologies for arc surfacing of metal layers with flux cored wires/tapes with increased resistance to various types of wear The scientific novelty of the obtained results lies in establishing the dependence of the composition and properties of the metal deposited by arc surfacing on steel sheets on the amount and type of functional components added to the charge of powder surfacing materials, as well as pulsed arc power supply, which comprehensively affects its resistance to abrasive wear.