Technology of applying antifriction coatings using an electric arc pulsating power

Abstract

The coating of a mechanical mixture of metal powders and solid lubricant material is due to difficulties due to the low adhesive and cohesive strength of the resulting coatings. This problem can be avoided when using in the process of the pulsating power electric arc (PPEA). The object of research in the paper is an anti-friction coating based on ΠΓ-XH80CP3 powder with the addition of 20% by volume of graphite ΠΓ-50, of which plasma coating using PPEA gave a coating with friction coefficients fmp min = 0.038 and fmp max = 0.062 under contact load of 300 MPa. The test results of a friction pair, carried out for 500 hours on a path of friction of 55,000 m, showed the stability of the friction coefficient within fmp = 0.056 … 0.061. The application of the coating process using the surface activation of the PPEA allowed us to obtain high-strength anti-friction coatings with the content of a solid lubricant element in the coating composition up to 20% of the total coating volume.