To the Question of Surface Treatment of CPG Parts in the Process of Applying Coatings on Them

Abstract

The effect of the sandblasting pressure and the volume of alumina on the roughness of the substrate made of the AK12MMgN alloy, on the roughness of the deposited galvanic-plasma modification (GPM) coatings after blast cleaning, and on the adhesion strength of these coatings is investigate. It has been established that the proposed technology of surface treatment of cylinder-piston group (CPG) parts made of AK12MMgN alloy both before the application of GMG coatings and after their application to the above alloy makes it possible to obtain a heat-shielding layer, leading to significant fuel savings in diesel internal combustion engines. This method of treating the surfaces of the parts of a diesel engine CPG before and after applying heat-protective and wear-resistant coatings, confirmed by full-scale and bench tests, seems to be effective.