METHOD FOR PROCESSING THE WORKING SURFACES OF THE PARTS OF THE FRICTION UNIT Russian patent published in 2023 - IPC B23H9/00 C23C28/00 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of mechanical engineering and can be used in the application of wear-resistant and scuff-resistant coatings on the working surfaces of parts of friction units to improve their reliability. The method includes transferring the anode material with the help of electrospark alloying to the working surface of the part being processed under the following electrical modes of the pulse sources: open circuit voltage or voltage at the working electrodes U=10-200 V; short circuit current I_s.c..=0.5-10 A; operating current I_p=0.5-10 A; pulse discharge energy W=0.3-0.7 J; current in the pulse Iu=0.05-1.5 kA; pulse duration ε=10^-6-10^-3 s. “БрАЖМц” 10-3-1.5 material is used as the anode material during electrospark alloying, and the part is made of carbon steel. Moreover, electrospark doping is carried out at an electrode rotation frequency ω=(4-6)×10³ rpm for a specific time τ=1.0-3.5 min/cm². After electrospark alloying, the resulting coating is treated with a copper rod in a medium of a mixture of glycerol and copper chloride, taken in a percentage ratio of glycerol/copper chloride from 97:3 to 99:1, with the following operating parameters: pressure on the rod p=50-120 MPa; sliding speed v=0.01-0.1 m/s; rod feed x=50-80 µm/rev; the number of passes of the rod on the treated surface of the coating y=4-6; with removal of the applied coating layer z=10-30%. After that, the treated coating is passivated, dried, and then a composition is applied to it, containing in wt.%: copper 4-12; polytetrafluoroethylene 2-8; glycol borate 2-8; lubricant “ЦИАТИМ”-201 - the rest up to 100.

EFFECT: increasing the antifriction and antiwear properties of coatings on the working surfaces of parts of the friction unit.

1 cl, 1 tbl