Applied Physics and Mathematics Annotation << Back ANALYSIS OF THERMAL AND DIFFUSION PROCESSES DURING EPO SURFACES OF ELECTROEXPLOSIVE ALLOYING A.V. IONINA The mechanisms of strengthening the ignition of layers of carbon steel 45 after combined treatment, which is calculated in electroexplosive boron aluminizing, aluminizing together with silicon carbide of steel 45 and EPO solution, are revealed. Combined processing leads to an increase in the hardening index. The microhardness after electroexplosive boron plating and EPO is 16 GPa, the hardening depth is 90 μm, and after electroexplosive aluminizing with mixed silicon carbide and EPO, it is 12.5 GPa and 50 μm, respectively. In the initial state, the microhardness is 2 GPa. Wear resistance under conditions of dry sliding friction after electroexplosive boron aluminizing and EPO increases by 43 times, and during electroexplosive aluminizing with silicon carbide - by 12 times. Surface hardening is achieved due to the formation of a finely dispersed nonequilibrium structure containing hardening phases. The developed models make it possible to explain the obtained results by the peculiarities of the course of thermal and diffusion processes d uring EPO. Keywords: surface hardening, electro-explosive alloying, wear resistance, dislocation substructure, hardening mechanisms, microhardness. DOI: 10.25791/pfim.05.2023.1276 Pp. 36-46.