Development algorithm of the technological process of manufacturing gas turbine parts by selective laser melting

The selective laser melting technology makes it possible to manufacture parts from powders of aluminum, titanium, heat-resistant alloys, stainless steels. These alloys are widely used in aircraft engine manufacturing for the manufacture of the main components of the hot tract of gas turbine engines. To date, the use of selective laser melting technology is growing in the production of functional parts. This, in turn, requires the development of a methodology for designing technological processes for the manufacture of parts, including databases of standard technological processes. The use of the technique will make it possible to exclude the influence of the subjective factor on the quality of manufactured products, as well as to reduce labor input and costs for the development of the technological process by using standard technological processes integrated into the database methodology. As an approbation of the developed technique, a technological process for manufacturing a flame tube of a small-sized gas turbine engine was developed. The results of the investigation of the influence of the laser beam motion strategy, as well as the influence of the growing direction of the samples on the mechanical properties of the synthesized material, are presented. It is established that the best values of the ultimate strength and total deformation of the four investigated regimes are achieved by shading with a laser beam with rotation 0 ° - 45 ° - 90 ° and are 1120 MPa and 13.9%, respectively. The best values for the ultimate tensile strength of the material are achieved at a slope angle of 90 degrees, where the tensile strength is higher by 15% and 19% with respect to the slope angle of 0 and 45 degrees, respectively.