METHOD FOR RESTORING THE WORKING VALVE FACE OF THE GAS DISTRIBUTION MECHANISM OF AN INTERNAL COMBUSTION ENGINE Russian patent published in 2022 - IPC B23P6/00 B23K9/04 B23K26/342 C23C24/00 

FIELD: engine technology.

SUBSTANCE: invention relates to a method for restoring the working valve face of the gas distribution mechanism of an internal combustion engine and can be used in engine-building and repair production. Cleaning, flaw detection and primary mechanical treatment of the working valve face are carried out. Then, a nickel-based powder composition is surfaced with the addition of silicon carbide and zirconium dioxide by short-pulse laser treatment and smoothing of the surface of the working valve face with maintaining the valve angle in the range of 45 ± 0.5° and obtaining the roughness of the surface of the working valve face Ra 0.32.

EFFECT: invention provides a superhard wear-resistant heat-resistant coating with a low coefficient of friction of 0.12-0.15, thickness within 10-15 microns, having a gradient of properties in thickness, and thermal resistance at 1000°C.

1 cl, 3 dwg