Abstract
The global demand for oil and gas products has caused noticeable qualitative and quantitative changes in the applied technological processes of manufacturing parts and equipment for the extraction and transportation of oil products. Kazakhstan is the largest oil-producing country in the world, therefore, the development of advanced technology for the production of oil and gas equipment can stimulate industrial and economic growth. Traditional technologies for hardening critical parts of Wedge-Shaped Columns (WSC) are energy-consuming and labor-consuming, although they are used in many industrial enterprises. For scientific research on chemical-thermal hardening of a low-carbon alloyed die made of steel 20X, GOST 33260-2015 (207 Steel), wedge column piping, an experimental installation for electrolytic-plasma hardening has been developed. Experimental studies of plasma electrolyte hardening were carried out in various processing modes. The dependence of the current-voltage characteristic of the high-speed heating of the part on the temperature of the ionized electrolyte plasma is described. The processes of heat transfer, heating, and quenching in the electrolyte are described by a mathematical model, a regression formula is derived. The main parameters of the electrolytic-plasma hardening are determined, and the optimal processing modes are derived. Raster elemental analysis indicates the surface modification of the hardened layer of low-carbon alloy steel with carbon. The method of electrolytic-plasma hardening allows locally hardening of the mating working surfaces of the PCC die. Investigated the results of changes in the microstructure, an increase in hardness relative to the initial state. The article is financially supported by the "Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan" within the framework of the grant project IRN AR09058518 "Increasing the wear resistance of materials in the engineering industry by electrolyte-plasma modification".