Structure formation of high-temperature alloy by plasma, laser and TIG surfacing

Abstract

The paper presents the results of a study of the formation of the structure and properties of metals in the technologies of additive processes, namely plasma, arc and laser surfacing of high-alloy Chromium-Nickel alloys. The main problem of Chromium-Nickel alloys in the processing of highly concentrated energy sources (welding, surfacing, soldering, plasma and laser processing) is insufficient strength and heat resistance after high heating and rapid cooling, characteristic of these methods. The paper presents the results of a study of the structure, phase formation and properties of Chromium-Nickel alloys in plasma surfacing of high-alloy steel wire. To study the possibilities of modifying the structure during argon-arc surfacing, additional ultrasonic action on the deposited material was applied with the help of a waveguide connected to the lower surface of the sample. A comparison of the structures of the surfacing alloy obtained by laser cladding found that arc welding of alloy in combination with ultrasonic action created the additional effect of increasing the dispersion of the phases, which led to increased high-temperature strength of the alloy.