Rezumat
The results of welding homogeneous and heterogeneous metals in the hard state with the use of cur- rent impulses with large closeness are represented. The chart of treatment by a current providing the receipt of the welded connection at it heating in an air atmosphere is offered. Influence of alternate and unidirec- tional current on deformation the microasperities of contact surface in the area of welding is considered. The basic parameters of impulsive current and energy density of treatment the steel standards and the copper standards providing the receipt of the welded connection are rated.