METHOD OF COMBINED STRENGTHENING OF PARTS SURFACE Russian patent published in 2008 - IPC C23C4/18 B23H9/00 

FIELD: technological processes.

SUBSTANCE: invention is related to the field of strengthening and finishing machining of parts and may be used in different fields of machine building for strengthening of parts surface. Powder coating is applied on surface by means of plasma sputtering. Its plastic deformation is performed by electric current passing through zone of device contact with coating. Density of electric current is determined under the condition of temperature of 900-1200°C at the border of main metal with powder coating. Value of deformation force of device F is determined based on the following condition: F=p·A_k, where: p - contact pressure, which is determined on the basis of plastic deformation penetration to the depth equal to thickness of applied powder coating: p=H_μcoat. (Hμ_coat. - microhardness of powder coating, MPa); A_k - area of device contact with machined surface of powder coating: where Δh_coat.=h_coat.·(1-Ψ) - change of powder coating thickness as a result of plastic deformation, R and r -radiuses of working profile of deforming device, ρ - radius of powder coating machined surface curvature, Ψ - porosity of powder coating.

EFFECT: higher wear resistance of metal.

4 dwg, 2 tbl, 1 ex