Springer Science and Business Media LLC

The balance of zinc and lead is calculated during steel smelting in an electric arc furnace (EAF). It is shown that the main proportion of zinc and lead is removed from metal during charge melting in an EAF, and the remaining amount evaporates during steel degassing. With an increase in the proportion of galvanized steel in a charge, dust formation and zinc and lead contents in EAF discharges increase considerably. In order to determine a strategy for treating zinc-containing dust, it is necessary to monitor its content in all production stages.

Currently, direct laser deposition is a key research area since use of this technology is distinguished by cheapness and the possibility of preparing an object of almost any shape. However, numerous aspects of material manufacturing technology and structure formation remain unstudied. The process of preparing polymetallic specimens consisting of layers of alloys Inconel 625 and EP741 is considered. A polymetallic specimen microstructure is extended nickel solid solution crystals. Element distribution in a grain boundary zone shows a smooth change in composition as a result of element diffusion from Inconel 625 alloy into EP741, and conversely. Layer microhardness varies from 300 to 500 HV with transition from Inconel 625 alloy into EP741