DOI: 10.18503/1995-2732-2025-23-3-159-168
Abstract
Traditionally, branch tubes for process pipeline systems at nuclear power plants are made by stamping. However, when using this method, a serious problem arises such as a high percentage of defects due to the uneven distribution of material over the product. This leads to a decrease in product quality and an increase in production costs. In this regard, there is a need to search for alternative manufacturing methods. One of the promising areas is the use of additive technologies, namely direct energy deposition. The purpose of this work is to study the possibility of using direct energy deposition as a new technology for the production of branch tubes. As part of the research, a pilot batch of parts and test samples were produced. The accuracy of the geometric parameters of the obtained branch tubes was monitored, as well as the assessment of the physical and mechanical properties and quality of the surface layer. The results of the study showed that the chemical composition of the sample material meets the requirements for the 08Cr18Ni10T steel grade. However, mechanical tests revealed some inconsistencies in the field of yield strength. The samples have high resistance to intercrystalline corrosion, as well as a low degree of contamination with non-metallic inclusions, the con-tent of the ferrite phase does not exceed 5%. The control of the geometric parameters of the branch tubes showed that all dimensions meet the design requirements, and there are no unacceptable defects on the surface. Based on the data obtained, recommendations were made on possible adjustments to the technology to ensure compliance with all GOST requirements for mechanical properties. The practical significance of the research lies in the possibility of using the results obtained to optimize production processes and improve product quality in the nuclear industry.
Keywords
direct energy deposition, branch tubes, metal powder composition, 08Cr18Ni10T steel, metallography, mechanical properties, geometric precision, surface layer quality, tumbling
For citation
Zlobin E.P., Balyakin A.V., Khaimovich A.I., Kotov K.A., Kretov K.S., Platonov M.S. Manufacturing OF Branch Tubes for Nuclear Industry by Direct Energy Deposition Made of Metal Powder Composition 08Cr18Ni10T. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2025, vol. 23, no. 3, pp. 159-168. https://doi.org/10.18503/1995-2732-2025-23-3-159-168
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