Modifying the liquid phase with nanoscale powders in the process of welding and cladding

Experimental studies of effect of nanomodifying powders of refractory compounds on properties of weld seam at welding of aluminum alloy and cladding a protective coating on a steel plate were conducted. The welding of aluminum alloy AMg6 was carried out using an electric arc welding with nonconsumable (tungsten) electrode (TIG welding). The modifying agent was nanoscale powder of TiCN refractory compound. Additional electrode (modifying powder wire) was produced using a vibrating ball mill, in which a mixture of sliced standard additional wire AMg6 and nanopowder TiCN had been prepared. The mixture was placed in a thin-walled container made of AMg6, compacted, and then, it was extruded using a vertical press. As a result, wires with diameter of 3 mm were obtained, containing 2 % of TiCN and 0.7 % of TiCN, respectively. Welds were obtained with the standard additional wire and modified wire containing TiCN. The protective coating for steel was deposited using plates with thickness of 3 mm made of steel S235JR...