Selective laser melting is one of the modern methods of manufacturing parts in the production of machine-building equipment, a special place is occupied by complex technological processes used in the manufacture of high-load units of pneumatic-hydraulic system from heat-resistant alloys. The studies were performed on samples made of powder material AISI 316L stainless steel martensite class. Tests to determine the mechanical properties were performed in accordance with ISO 6892 on an INSTRON test machine. The control of the surface roughness was performed using a BioBase device. From microstructural analysis and testing the method of registration of macrolocalization fields of the working zone samples, it was found that the destruction began from the surface of the samples from the microconcentrators due to different roughness.

Селективное лазерное плавление (SLM) – это технология аддитивного производства при которой с помощью лазера можно изготавливать детали со сложной геометрией и высокими механическими свойствами. Однако, оптимальные технологические параметры SLM-процесса для металлических материалов сложно предсказать. Представлены результаты универсальной и упрощенной модели для прогнозирования плотности энергии в области границ металлической детали из Inconel 718, для предотвращения отклонений в геометрии детали на основе соотношения между плотностью подводимой удельной энергии и ее поглощением во время процесса.

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The process of destruction is the final stage of the behavior of the metal under load, and the resistance that the metal gives to the development of this process, largely determines its structural strength. The studies were performed on samples made of Inconel 718 powder material after standard heat treatment. Tests to determine the mechanical properties were performed in accordance with GOST 1497 on an INSTRON test machine and performed analytical calculations using QForm software at a stable running traverse speed of 2 mm / s. Geometric parameters were monitored using a 3-D scanner and Geometric Control X software. A comparison of the ideal technical diagram with the true technical diagram of the Inconel 718 material revealed that they differed. These discrepancies are explained by the fact that the experimental material tested for stretching, in fact, has a higher value of plastic characteristics by 30% due to the porosity in the experimental material.

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