ВПЛИВ МАГНІТНОГО ПОЛЯ НА ЯКІСТЬ ВНУТРІШНЬОЇ МІКРОСТРУКТУРИ ПРИ ЛАЗЕРНОМУ СПЛАВЛЕННІ ПОРОШКУ

Abstract

Thefast development of scientific and technical progress pushes the scientific community to search for alternative solu-tions and approaches for obtaining details using non-traditional technologies. One of the most common nowadays are additive technologies, better known as 3D printing from various powdered materials.When planning technological processes, in front of the developers always have relevant tasks which aimed to increasing the efficiency of the implementation of the 3D technology process, also improving the technological equipment. The main efforts are aimed at improving the quality indicators of the internal structure of alloyed products.The aim of this work is to improve the quality of the internal microstructure of fused primitives from the AlSi10Mg powder composition, due to the addition of a static magnetic field to the laser processing zone when implementing the DMLS technology.Taking into account the high complexity of physical processes and the large number of technological factors that affect the implementation of DMLS technology, the methods of mathematical statistics that have proven themselves well for solving this kind of tasks. When studying the effect of a static magnetic field on the focal area of a gas-powder flow, the optimal control parameters for the process of laser fusion of experimental samples from the AlSi10Mg powder composition were established.In this work, the effect of a static magnetic field on the microstructure of the AlSi10Mg powder composition was investi-gated. The results showed that the applied magnetic field leads to an increase in the relative density (a decrease in the porosity of the internal microstructure and a decrease in the spacing between dendrites in the treated material. In addition, with an increase in the intensity of the magnetic field, the share of grains with a columnar morphology decreases, and the share of equiaxed grains increases.