When using double-electrode welding and surfacing with the additional filler wire, there is a noticeable instability of the burning arcs and also a strong deviation of the main arc in the direction of the filler supply. Analysis of the magnetic fields around the wires showed that the electrodynamic pressure on the plasma decreases with increasing distance to the melting point of the additive and increasing angle between the wires. Recommendations are given for choosing the angle between the wires, polarity and arcs supply voltages.