MODIFIED ANTIFRICTION LAYER FORMATION METHOD ON FRICTION UNIT WORKING SURFACES Russian patent published in 2017 - IPC C23C24/02 

FIELD: machine engineering.

SUBSTANCE: friction unit working surfaces roughness parameters Rz_i are prelimenary determined. 10-50% from the total amount of serpentine powder is heat treated at the temperature of 1200-1300°C. After that, the serpentine powder is cooled and mixed with the remained amount. The prepared mixture of the heat treated and non-heat treated serpentine powder is fed into the friction area. The friction units working surfaces fitting is provided. The flow rate of the serpentine powder mixture is 0.003-0.02 g/cm², and the serpentine particles size is not more than 2Rz_max, where Rz_max - the maximum roughness parameter of the friction unit working surface.

EFFECT: technological process efficiency increase due to the formation of the stable modified antifriction layer, containing the intermetallic compounds of high hardness, that do not interact with the hydrocarbon materials, and increase of the machines and mechanisms with friction units service life due to the increased wear resistance of the modified surfaces, the friction units, modified by the proposed method, in particular the high-loaded ones, can be effectively operated in conditions of dry and boundary friction.

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