Влияние мощности лазера и термической обработки на микроструктуру и механические свойства жаропрочного сплава

Abstract

The paper presents the results of experimental studies on the effect of laser power and heat treatment on the microstructure and mechanical properties of heat-resistant alloy EP648 samples obtained by direct laser deposition. It is shown that increasing the laser power from 1200 to 2000 W improves the melting degree of powder particles and enhances the mechanical characteristics. The optimal parameters for achieving high-quality parts are determined: laser power of 1800–2000 W and heat treatment regime including quenching at 1180±10°C followed by aging at 900±10°C. These findings can be applied in additive manufacturing of gas turbine engine components requiring high strength and thermal resistance.