Feasibility of Production of Multimaterial Metal Objects by Laser-Directed Energy Deposition

The article focuses on the possibility of manufacturing bimetallic products for specific industrial applications using laser-directed energy deposition (LDED) additive technology to replace the traditional brazing process. Preferential process regimes were determined by parametric analysis for the nickel-alloy-steel and molybdenum-steel pairs. Comparative studies of the microstructure and hardness of the deposited layers and the transition layer at the boundary of the alloyed materials have been carried out. It is shown that LDED provides better transition layer and operational properties of the final part since the low-melting copper layer is no longer needed. A combined technological process has been developed, which consists in combining the traditional method of manufacturing a workpiece through the casting and deposition of a molybdenum layer by LDED.

Automated summary

The article explores the potential of using laser-directed energy deposition (LDED) additive technology to manufacture bimetallic products as an alternative to the traditional brazing process. Parametric analysis is used to determine the optimal process regimes for different alloy pairs. Comparative studies of the deposited layers and transition layers are conducted, showing that LDED provides improved transition layers and operational properties without the need for a low-melting copper layer. A combined technological process of casting and LDED deposition is developed.