The aim of this thesis was to investigate the possibility of repairing engraving inserts used in high-pressure die casting of aluminium using Direct Energy Deposition (DED) technology. Three different filler materials were tested, and their composition, hardness, impact toughness, and microstructural characteristics were examined. Based on the results, the most suitable material was selected and successfully applied in the actual repair of a damaged engraving insert. The work combines an experimental and practical approach and provides guidelines for further optimisation of DED processes in industrial applications.
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