Which AM post-processing technique is used to improve the physical and mechanical properties of metal parts?

Heat treatment is a fundamental post-processing technique utilized to enhance the physical and mechanical properties of metal parts produced through additive manufacturing (AM). This process involves subjecting the metal to controlled heating and cooling cycles, which can alter its microstructure and significantly improve characteristics such as strength, hardness, ductility, and toughness.

By applying heat treatment, materials can relieve internal stresses, refine grain structures, and achieve desired hardness levels through processes such as annealing, quenching, and tempering. As a result, products that have undergone heat treatment often exhibit improved performance in their intended applications.

While other options such as surface polishing, coating application, and laser engraving can enhance aesthetics, surface finish, or provide protective layers, they do not fundamentally alter the core material properties in the same transformative way that heat treatment does. Thus, heat treatment stands out as the optimal choice for improving the overall performance of metal parts produced by additive manufacturing.