Study of Structural Phase Transformations in the Metal of Welded Joints of Reactor Plants for Nuclear Icebreakers

—The method of mathematical modeling was used to determine the rate of cooling of the heat-affected zone upon assembling the weld joints of reactor plants for nuclear icebreakers by preweld depositions. The effect of thermal cycles in various sections of deposited metal welded using three types of w...

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Bibliographic Details
Published in:Inorganic materials : applied research 2022-12, Vol.13 (6), p.1746-1753
Main Authors: Timofeev, M. N., Samoylenko, R. I., Galyatkin, S. N., Markova, Yu. M., Anisimov, D. M., Korolev, S. A., Gurkin, S. V.
Format: Article
Language:English
Subjects:
Acicular structure
Carbon steels
Chemistry
Chemistry and Materials Science
Cooling rate
Extensometers
Ferrite
Heat affected zone
Icebreakers
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Manganese steels
Materials Science
Nickel
Pearlite
Phase transitions
Quenching
Radiation Materials Science
Silicon
Steel wire
Welded joints
Welding
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Summary:—The method of mathematical modeling was used to determine the rate of cooling of the heat-affected zone upon assembling the weld joints of reactor plants for nuclear icebreakers by preweld depositions. The effect of thermal cycles in various sections of deposited metal welded using three types of welding consumables, namely, carbon steel, silicon-manganese steel, and steel alloyed with nickel, was simulated using a quenching deformation dilatometer. The structure and hardness of the samples after simulated exposure to thermal welding cycles were studied. The deposited metal in using a Sv-06AA carbon wire was found to have a ferrite-pearlite structure throughout the range of cooling rates. An Sv-08GS manganese silicon wire forms an acicular ferrite structure in a wide range of cooling rates, while an Sv-10GN steel wire alloyed with nickel forms an acicular and quasi-polygonal ferrite structure.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113322060260