The results of solid-state welding of homogeneous and heterogeneous metals with application of high density current pulses are presented. A chart of the current treatment allowing obtaining of the welded joint at its heating in an air atmosphere is proposed. The influence of alternating and unipolar current on the deformation of contact surface microroughnesses in the welding zone is considered. The basic parameters of the pulse current and the specific energy of the treatment of steel and copper samples that ensure obtaining of the welded joint are determined.
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