Computer-Aided Design of Process of Fabrication on Steel of Solid Lubricating Coating Based on Bank Sand

The results of investigation of tribological properties of solid lubricating coatings fabricated on high carbon steel of U8 grade (0.8% of C) using thermo-hydro-chemical treatment (THCT) in an aqueous-dispersion medium based on bank sand are presented. The composition of the medium and the temperature and the time parameters of THCT process were optimized by the friction coefficient of solid lubricating coatings. The diagrams of “parameters of process–property” were constructed using mathematical models. Processing by optimal THCT regime of U8 steel in hydrosol medium of bank sand makes it possible under the condition of lubrication absence to decrease the friction coefficient of steel surface by 5.4 times as compared with rough-sawed surface.