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According to the three-dimensional digital model additive production as a method of product manufacturing allows creating complex-profile structures with high mechanical and operational specifications. Metal products structuring in accordance with the process of their production is of considerable interest. The paper presents a comprehensive study of the technological parameter influence on selective laser sintering (SLS) technology on the properties of samples of heat-resistant nickel alloy Inconel 718. A comparative analysis of the mechanical properties of the Inconel 718 alloy, obtained by sintering powders produced in Great Britain («LPW») and China («Sino Euro»), with the regulatory characteristics of ASM 5662M (for alloy Inconel 718) and TU 14-1-3905-85 (for alloy EP718-VD) is conducted. The dependence of mechanical and heat-resistant properties of Inconel 718 alloy from the direction of the part’s growth, horizontal direction XY and vertical direction Z, has been established. The microstructure of Inconel 718 alloy samples was studied before and after heat treatment. Using Unigraphics NX 7.5, a 3D–model of aviation parts was built. In particular, they are a turbine nozzle and fuel swirler for the needs of the combustion chamber of an aircraft engine. The 3D–printing of the parts for aviation application is characterized by a smaller number of technological operations. Costs for equipment and additional machining are reduced and product prototyping is simplified. In its turn, it allows reducing the mass of parts by 10–20 % compared to their metal analogues, discarded by machining.
Keywords: Аdditive technologies, selective laser sintering, Inconel 718, 3D–printing, 3D–model© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.