Analytical Study of the Appearance of Heat Sources on the Surface of a Part during Electrospark Alloying

The mechanism of heat source formation on electrodes during low-voltage electrospark alloying is theoretically studied. Analytical dependences of the released heat power on the electron ionization current and thermionic emission of a cathode are obtained. Approximately 66% of the heat power during electrospark alloying at low voltages in a spark discharge are found to release at an anode, and the contribution of thermionic emission is insignificant. An analytical method is used to determine the average ion concentration and its change in a spark channel. During theoretical considerations, the pressure at any time is assumed to be the same over the entire cross section of the channel.