The results of modeling and design of the structure of the delta-layout software and hardware complex and the results of experimental studies of surfacing of metal products on the developed complex are presented. The surfacing technology is based on automatic electric arc welding with a melting electrode in an environment of protective gases. It is determined that with electric arc layer-by-layer surfacing, the walls of products have a gradient structure. Only the last fused layer has a dendritic structure. The underlying layers are subjected to secondary heat treatment due to the heat generation of the upper layers. The decrease in microhardness from zone 1 to zone 4 is due to a decrease in the ratio of the perlite component in the structure and an increase in the ferritic component. The increase in the percentage of manganese and silicon relative to the base metal is due to the fact that in zones 1—3 there is a transition of these elements from the surfacing material, and their decrease in zone 4 is due to burnout. The decrease in the percentage of carbon is due to the fact that in zone 1 there is a mixing of the surfacing material with the main one, in zones 2 and 3 the burnout of this element occurs, and in zone 4 there is a slight increase, because there is no burnout process.