| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: invention relates to a technology of gas-thermal spraying, namely to plasma methods of spraying of wear-resistant coatings on parts operating under the simultaneous effect of wear and corrosive environments, and can be used in machine industry, metallurgy, power engineering and other areas of production. According to the method the dispersed ceramic powder is entered through the annular gap in air-plasma jet and its subsequent sputtering on the pretreated surface of the part. At the same time the dispersed particles of aluminium oxide Al2O3 are used, with the following ratio of fractional composition: 20-40 microns in an amount of 75-85% and less than 20 microns - the rest. Spraying is carried out at the plasmatron power within the 44-54 kW and air flow rate of 1-2 g/s. ^ EFFECT: increased microhardness and wear resistance of coating. ^ 1 tbl, 1 ex |
