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01-06-2024 | STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION

Effect of Thermal-Kinetic Conditions of Austenite Transformation on the Structural-Phase State of Low-Carbon Steel Sheets

Authors: Yu. V. Khlebnikova, I. L. Yakovleva, L. Yu. Egorova, T. R. Suaridze, N. L. Chernenko, V. V. Ryabov, S. V. Korotovskaya, E. I. Khlusova

Published in: Physics of Metals and Metallography | Issue 6/2024

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Abstract

The structure and mechanical properties of rolled sheets with a thickness of 40 mm made of low-carbon low-alloyed steel after thermomechanical treatment of different modes are investigated. The structural factors that affect obtaining high mechanical properties are established. It is shown that a complex treatment including quenching from the rolling temperature and high-temperature tempering with a subsequent additional cycle of quenching and tempering leads to formation of rolled sheet uniform over the cross section with a fragmented bainite structure with disperse niobium carbides and carbides of cementite type. Such structure provides a yield strength of no less than 630 MPa in combination with high values of the impact energy at negative temperatures and a level of plasticity of δ ≈ 20%.

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Metadata
Title
Effect of Thermal-Kinetic Conditions of Austenite Transformation on the Structural-Phase State of Low-Carbon Steel Sheets
Authors
Yu. V. Khlebnikova
I. L. Yakovleva
L. Yu. Egorova
T. R. Suaridze
N. L. Chernenko
V. V. Ryabov
S. V. Korotovskaya
E. I. Khlusova
Publication date
01-06-2024
Publisher
Pleiades Publishing
Published in
Physics of Metals and Metallography / Issue 6/2024
Print ISSN: 0031-918X
Electronic ISSN: 1555-6190
DOI
https://doi.org/10.1134/S0031918X24600647