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Influence of high-speed arc metallization wire feed rate on tribological and corrosion properties of 30HGSA steel coatings

Rakhadilov Bauyrzhan, Shynarbek Aibek, Kakimzhanov Dauir, Muktanova Nazerke, Kusainov Rinat

Materials Science Poland

2024

Vol. 42, No. 3

171--180

This study investigates the influence of wire feed rate on the porosity of coatings, elemental analysis, corrosion resistance, tribological properties, and microstructure of iron-based coatings deposited by high-speed arc metallization. The coatings were obtained using a SX-600 high-speed electric arc metallizer. The properties of Fe-based coatings depend on the arcsputtering parameters. Determination of the optimum arc spraying parameters helps to minimize the deterioration of coating properties. Increasing the wire feed speed leads to an increase in the current value, which generates more heat energy in the arc to melt the wire and consequently favours the formation of dense coatings with low porosity. At high temperatures, Fe-based coatings form oxide deposits that protect the coating from further oxidation and increase coating hardness. Tribological tests show that the friction coefficient of coatings decreases in the presence of FeO on the coating surface, activating its self-lubricating ability. Investigation of the porosity of the samples showed that adjusting the wire feed affected both the pore size and the number of pores.

Effect of Voltage on Properties of 30HGSA Steel Coatings by Supersonic Supersonic arc Metallization Method

Rakhadilov Bauyrzhan, Shynarbek Aibek, Kakimzhanov Dauir, Kusainov Rinat, Zhassulan Ainur, Ormanbekov Kuanysh

Advances in Science and Technology. Research Journal

2024

Vol. 18, no. 5

113--124

This work is a study aimed at optimizing the process of superarc metallization, with a focus on the effect of stress on the properties of the spraying coatings. In this work, 30HGSA grade steel wire was used for the coating of 45 steel, widely used in mechanical engineering. The use of supersonic arc metallizer SX-600 allowed to obtain coatings at different voltages (32 V, 38 V and 44 V) and the same current strength. Various metallization process parameters such as material feed rate, voltage, current, distance and nozzle geometry are discussed in this paper. Using various analytical techniques including X-ray diffraction analysis, microscopy, microhardness and corrosion resistance tests, the qualities of the coatings were evaluated. Particular attention was paid to analyzing the phase composition of the coatings, porosity, substrate bond strength and tribological characteristics. It was found that the voltage during the electric arc metallization process has a significant effect on these characteristics. The selected optimum voltage allows to obtain dense and homogeneous coatings with improved performance properties. The results of the study revealed that the best physical and mechanical properties were exhibited by the sample processed at 38 V, which showed lower porosity and improved strength characteristics compared to the other samples. These findings can be used to improve manufacturing processes in industries such as automotive and mechanical engineering, where restoration and improved performance of worn parts is required.