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gas-thermal spraying, coating, electric arc spraying, gas-flame spraying, wire materials, wear resistance, strengthening, restoration, alloy structural steels 

The process of gas-thermal spraying of coatings made of wire materials has been studied by determining rational regimes to increase the wear resistance of surfaces of vehicle parts. It is determined that the main factors influencing the wear resistance of steel gas-thermal coatings are the cooling rate of steel and the concentration of alloying elements. It is shown that in order to obtain wear-resistant sprayed coatings from alloyed structural steels it is necessary to achieve certain conditions of coating formation, namely: heating and spraying temperature of wire, cooling rate of molten particles, and their oxidation state. One of the most probable reasons for increasing wear resistance is the saturation of the melt droplets with alloying elements (primarily chromium) and impurities of introduction (carbon, nitrogen) in the process of melting the wire in the flame. The relatively low flight speed of molten steel particles and the high concentration of propane-containing carbon in the combustion products contribute to the deep saturation of the melt droplets with carbon. It is likely that these circumstances are associated with the process of increasing the wear resistance of coatings obtained by gas-flame and electric arc spraying. An additional factor that increases the wear resistance of the sprayed coating may be the saturation of the melt droplets with carbon in the process of melting and spraying using propane flames. Studies have suggested that both for the method of gas-flame spraying and for the method of electric arc spraying, there are modes and steels for spraying, which can increase the wear resistance of the coating. On the basis of the conducted researches technologies of strengthening and restoration of details of vehicles by drawing wear-proof coverings are offered.

1. Vilage B., Rupprecht K., Pokhmurskaya A. Features of gas-thermal spraying with flux-cored wires. Automatic welding. 2011. No. 10. P. 26–30.
2. Matveishin E. N. Deposition of layers with high adhesion strength by methods of arc metallization. Automatic welding. 2000. No. 8. P. 20–22.
3. Kharlamov Yu. A. Thermal spraying of coatings and ecological compatibility of production, operation and repair of machines. Heavy engineering. 2000. No. 2. P. 3–10.
4. Pokhmursky V. I., Student M. M., Pikh V. S. Protective and restorative electric metallization of coatings from cored wires. New processes and equipment for gas-thermal and vacuum coating: Coll. of papers “Electric welding”. Kyiv: 1990. P. 66–69.
5. Karp I. N., Petrov S. V., Rudoi A. P. Installation for arc metallization in a supersonic flow of natural gas combustion products. Welding Production. 1991. No. 2. P. 22–23.
6. Ageev M., Solovuch Е., Lopata V., Study influence factors of the spraying process on the properties of electric arc spraying coatings. International Scientific Journal Problems of Tribology. 2021.Vol. 26. No. 1/93. P. 51–61.
7. Ageev М., Dovzhuk S., Nikolaychuk V. The Influence of Design Parameters for Electric arc Equipment on the Factors of Spray Process and Properties of Coatings. Central Ukrainian Scientific Bulletin. Technical Sciences. 2019. Col. 1 (32). P. 114–123. ISSN 2664-262X.
8. Ageev М., Lopata V. Structural features in steel thermal coatings and the possibility of their use. Modern problems of preparation, manufacturing and repair in industry and transport: materials of the 16th international scientific and technical seminar (February 22–26, 2016, Zakarpattia region, Svalyava). Kiev: ATM of Ukraine. 2016, Р. 12–16.

1. Vilage B., Rupprecht K., Pokhmurskaya A. Features of gas-thermal spraying with flux-cored wires. Automatic welding. 2011. No. 10. P. 26–30.
2. Matveishin E. N. Deposition of layers with high adhesion strength by methods of arc metallization. Automatic welding. 2000. No. 8. P. 20–22.
3. Kharlamov Yu. A. Thermal spraying of coatings and ecological compatibility of production, operation and repair of machines. Heavy engineering. 2000. No. 2. P. 3–10.
4. Pokhmursky V. I., Student M. M., Pikh V. S. Protective and restorative electric metallization of coatings from cored wires. New processes and equipment for gas-thermal and vacuum coating: Coll. of papers “Electric welding”. Kyiv: 1990. P. 66–69.
5. Karp I. N., Petrov S. V., Rudoi A. P. Installation for arc metallization in a supersonic flow of natural gas combustion products. Welding Production. 1991. No. 2. P. 22–23.
6. Ageev M., Solovuch Е., Lopata V., Study influence factors of the spraying process on the properties of electric arc spraying coatings. International Scientific Journal Problems of Tribology. 2021.Vol. 26. No. 1/93. P. 51–61.
7. Ageev М., Dovzhuk S., Nikolaychuk V. The Influence of Design Parameters for Electric arc Equipment on the Factors of Spray Process and Properties of Coatings. Central Ukrainian Scientific Bulletin. Technical Sciences. 2019. Col. 1 (32). P. 114–123. ISSN 2664-262X.
8. Ageev М., Lopata V. Structural features in steel thermal coatings and the possibility of their use. Modern problems of preparation, manufacturing and repair in industry and transport: materials of the 16th international scientific and technical seminar (February 22–26, 2016, Zakarpattia region, Svalyava). Kiev: ATM of Ukraine. 2016, Р. 12–16.