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Information × Registration Number 0222U003026, 0118U100520 , R & D reports Title Creation of nano-modification technology for the metal structure of welds and the development of welding materials with dispersed inoculants in order to increase the mechanical properties of welded joints of low-alloy steels with 0,2690 MPa popup.stage_title Head Holovko Viktor V., Доктор технічних наук Registration Date 17-02-2022 Organization E.O.Paton Elektric Welding Institute National Academy of scinces of Ukraine popup.description2 The aim of the work was to study ways to prevent brittle fracture of welds, on the one hand, and the formation of fine-grained structure, both at the stage of primary crystallization and in the transformation process, which can provide mechanical properties of welds at the base metal level. To achieve this goal, a study of the peculiarities of the formation of the metal microstructure of the seams of low-alloy ferrite-bainitic steels with the introduction of dispersed inoculants to the welding bath.. Based on the analysis of factors influencing the development of the process of transformation of the weld metal structure in the presence of dispersed inoculants, an algorithm of hereditary influence of the primary structure parameters on the formation of the weld metal microstructure as a result of its recrystallization is constructed. n experimental-computational study of the relationship between the concentration of diffusion and dislocation hydrogen in weld metal, an experimental determination of the relationship between diffusion and dislocation hydrogen in iron and steel, the relationship between diffusion hydrogen in welds, which provided the basis to develop a physical model of hydrogen redistribution between diffusion and dislocation and to create software for its modeling.. Technologies for introducing modifying mixtures into the welding bath, and methods of numerical analysis of the structure of weld metal, the principles of construction of welding materials on the basis of nanomodification of weld metal by dispersed inoculators. Regulatory and technological documentation for the industrial production of batches of developed welding materials, experimental and industrial batches of coated electrodes type E69 4 for arc welding and flux-cored wire for welding low-alloy steels with a yield strength of not less than 690 MPa. Product Description popup.authors Kotel'chuk Oleksandr Sergijovych Palʹtsevych Andriy P Synyuk Volodymyr S Skoryna Mykola V Stepanyuk Sergiy Mikolayovich Shlepakov Valerii M popup.nrat_date 2022-03-09 Close