The formation of continuous penetration in electron beam welding is accompanied by a decrease of the level of the mean sum of the components of current with the frequency in the range 200-1000 Hz and 2.5-20 kHz, and also by the value being a multiple of the oscillation frequency. In electron beam welding with oscillation of the electron beam, the level of the useful signal is considerably higher. The existence of the parameters of the current of non-independent discharge in the plasma, providing information on the occurrence of continuous penetration, can be used in the development of new methods of-automatic control of the process of electron beam welding with continuous penetration.
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