TRIBOCHEMICAL ASPECT OF THE EFFECT HARD ALLOYS METAL ON DETERIORATION AT CUTTING

Warmth calculations of carbides and nitrides oxidation of some metals as elements of wearproof coverings define probability of formation corresponding oxide base metals under the cutting conditions. Proofness indicator (volume factor) of connections is introduced for the first time to estimate efficiency of coverings from nitrides, carbides and aluminides, formed oxides, under the cutting conditions. Experimental data of oxidation of pure metals, double alloys, including aluminides, allow to consider that the efficiency of aluminides of Ti, Fe, Cu, Nb, Zr, Ni, correlates with their proofness indicators values. Research of cutting firm alloys with coverings of TiC, TiN and Al2O3 in the air and in nitrogen atmosphere have confirmed efficiency of these coverings under the retardation (shortstop) of tribochemical contact reactions.