Method for producing wear-resistant antifriction multilayer coating

Claims

A method for producing a wear-resistant antifriction multilayer coating for a product, including vacuum-ion plasma application of a wear-resistant antifriction multilayer coating based on nitrides of Cr, Si, Al, characterized in that the coating is applied by vacuum-arc deposition from three electric arc evaporators connected to a droplet phase separator using three cathodes: two single-component cathodes made of chromium Cr ERH-100% and one combined cathode made of aluminum and silicon AlSi-88 / 12% in a gas environment containing a mixture of N2 + Ar gases, including preliminary degreasing of the surface of the part in an ultrasonic bath in ethyl alcohol for 1 hour, placing the workpiece in a vacuum chamber, followed by evacuation to a pressure of 1-2⋅10 -3 Pa, argon injection Ar - 5% into the vacuum chamber to a pressure of 2-5⋅10 -2Pa, processing the surface of the product with argon ions with energies of 1-3 keV at a temperature of 200-350 °C for 15 minutes and applying an adhesive layer of chromium using one electric arc evaporator in which a chromium cathode is installed with cathode current parameters in the range of 110-130 A for 1-2 hours, after which the surface of the part is heated to a temperature of 300-400 °C and applying the main wear-resistant layer based on nitrides of Cr, Si, Al using two electric arc evaporators in which chromium and aluminum-silicon cathodes are installed with cathode current parameters of 100 and 110 A, respectively, with the supply of nitrogen N - 11% and argon Ar - 6%, for 45 minutes, then the aluminum-silicon cathode is switched off, Ar - 7% is added and a layer of chromium is applied using one electric arc evaporator, in which a chromium cathode is installed with cathode current parameters of 110 A for 1 hour, then layers of chromium and Cr, Si nitrides are applied alternately,Al to obtain 6 layers of chromium and 6 layers based on nitrides of Cr, Si, Al, the final layer should be a layer based on nitrides of Cr, Si, Al.,