РЕАЛИЗАЦИЯ SLM - ТЕХНОЛОГИИ ДЛЯ ИЗГОТОВЛЕНИЯ ОБРАЗЦОВ ИЗ ЖАРОПРОЧНОГО СПЛАВА INCONEL 718, ПРИМЕНЯЕМОГО В АВИАЦИОННО-КОСМИЧЕСКОЙ ТЕХНИКЕ

Abstract

The new production method, called additive technologies, is a method with the ability to produce 3D products in layers. One of the most widely used methods for the additive production of metal products is selective laser melting. To melt the metal in the form of a powder, use a ytterbium fiber laser with a power of 200 to 1000 W, the radiation of which with the help of mirrors on a high-speed drive is focused to the required place. The subject of research was the possibility of creating products from the heat-resistant alloy INCONEL 718 by the method of layer-by-layer fusion on the equipment produced by LLC «Additive Laser Technology of Ukraine». The material for research was a test sample made by the SLM method (laser selective melting) by layer-by-layer fusion of the metal powder of the heat-resistant alloy INCONEL 718 with the laser beam. Research methods: microstructural analysis by light microscope Carl Zeiss AXIOVERT M200 MAT, particle size analysis by scanning electron microscope REM 106, the microstructure was detected by etching in CuSO4 + HCl. Objective: to establish the possibility of manufacturing a high-quality sample of alloy INCONEL 718, the study of its porosity and microstructure as the main indicators of print quality. Results: it was found that the equipment produced by LLC «Additive Laser Technology of Ukraine» allows to implement the SLM process and to manufacture products from INCONEL 718 alloy with high metal density. The study of the microstructure in the planes parallel and perpendicular to the direction of sample construction was performed. Conclusions: additive technologies are promising for the creation of parts and structures for aerospace technology, allowing to reduce the time and cost of their design and creation. The possibility of creating high-quality products from INCONEL 718 alloy using the SLM method at the installation of the production of LLC «Additive Laser Technology of Ukraine» (Dnipro) is shown. The interrelation of process parameters and microstructure is shown, which necessitates the development of reasonable SLM process modes for products for various purposes