Luchka M. SCIENTIFIC AND PRACTICAL PRINCIPLES formation of COMPOSITE wear resistant coatings by Galvani gradient STRENGTHENING FOR CRITICAL CONDITIONS OF FRICTION

The theoretical pre-conditions to obtain new composition electrolytic coatings (CЕC) for tribology application are created. The CEC have necessary gradients in composition and structures for preventing save of loss stableness under friction critical conditions. The tensile deformed state, which appear as a result of interaction between the superficial layers at diffusion alloying and eutectic alloying CЕC (Chemical and Thermal Treatment of CEC - CTT CEC) is investigated. The models of the tensely-deformed state for CEC. The composition coatings technology grounded on the strengthening of galvanopowder CTT CEC for extremal tribologycondition is developed. These models determine the places, which can accept the local originating stress. The areas their of application are determined. The equipment for practical realization was designed. The general advantages of developed gradient coatings in comparison, which known methods of hardning, protection and recovery of details (chromeplating, borating, eutectic melting, diffusive saturation). The recommendations for the practical using of the developed CTT CЕC technologies in a production to improve the functional efficiency: cathode grid of electrolyzers in chlorine production; cartridge of protective arbor; cartridge of supports of sliding of bit (workability in critical external environments); coverages inside cylinders axial piston pump - hydro-machine; recovey of the easy alloys of Аl, Mg, Ti details; plunger pairs of fuel apparatus (even wearproofness) are distributed reccomendations. Key words: chemical and thermal treatment, composition electrodeposition, transitional area, matrix, filler, adgesiv, tensely-deformed state, gradient, mixture, structure, sliding friction, loss of stability.