Abstract
It is shown that the longitudinal magnetic field of welding current in welding of two sheets transforms to the field of a single sheet and this confirms the electromagnetic nature of the interatomic binding forces. At a gap of 0.002 m and as a result of the separation of the lines of force, the induction of the longitudinal magnetic field of welding current rapidly increases and the arc starts to rotate. The electromagnetic force and magnetic pressure directed forward and to the side edges of the weld pool then appear. This results in the movement of liquid metal to the front part of the crater and to the side edges, formation of welded joints without undercutting, and confirms the electromagnetic nature of the formation of undercutting in one-sided high-speed welding. A method of one-sided high-speed welding with a compound electrode on a flux cushion with a gap of 0.002 m has been developed. The method improves the stability of the process and impact toughness of welded joints.
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