Analysis of the microstructure of tic-based surfaced layer by combining arc surfacing with self-propagating high-temperature synthesis.

The comparative analysis of microstructures of the built-up layers obtained by arc surfacing by powder electrodes is carried out. The electrodes as filler contained prepared powder of titanium carbide in one case, and in another case, powder mix of titanium and technical carbon (carbon black), where the self-propagating high-temperature synthesis of titanium carbide proceeded in case of thermal influence of electric arch. For the built-up layers, the complex of the structural parameters defining wear resistance under the conditions of friction on fixed abrasive is determined. Results of tests show that the wear resistance of layers applied at combination of arc surfacing with SPHTS is 1.27 times higher relating to the layers, which are built up by electrode with prepared powder of titanium carbide as filler. [ABSTRACT FROM AUTHOR]