Abstract
The metallographic methods of studying the structural features of the metal of a continuously cast slab and the hot-deformed metal with a carbon content of up to 0.31% produced on the casting and rolling complex at the Vyksa Steel Works are considered. The main attention is paid to methodological solutions, which allow us to qualitatively and quantitatively estimate the dendritic structure and the initial austenite grain size in a continuously cast slab and to find a relation between the structural states of continuously cast steel and the related hot-rolled steel. Such quantitative indicators of the dendritic structure of a “thin” continuously cast slab as the density of a dendritic structure and the secondary dendrite arm spacing are determined. The secondary dendrite arm spacings in a thin slab are found to be several times smaller than that in a “thick” slab. The change in a dendritic structure induced by hot deformation is shown to be best estimated using the change in the sizes and number of dendritic structure elements.
Similar content being viewed by others
REFERENCES
Evolution of Microstructure in Nb-Bearing Microalloyed Steels Produced by the Compact Strip Production Process be Arturo Ruiz-Aparicio BS Universidad Nacional Autonoma de Mexico (University of Pittsburgh, 2004).
A. N. Zavalishchin and E. V. Kozhevnikova, “Influence of continuous casting technology on the structure of low-alloy steel at various stages of production,” Metallurg, No. 12, 13–20 (2017).
A. I. Manokhin, Production of Homogeneous Steel (Metallurgiya, Moscow, 1978).
A. P. Belyi, O. B. Isaev, Yu. I. Matrosov, and A. O. Nosochenko, Central Segregation Heterogeneity in Continuously Cast Slabs and Rolled Plates (Metallurgizdat, Moscow, 2005).
GOST 10243–75. Steel. Methods of Testing and Estimating a Macrostructure (IPK Izd. Standartov, Moscow, 2004).
C. Geerkens, J. Wans, D. Lieftucht, A. Krasilnikov, and M. Kleinaist, “Special technologies and new developments to improve slab quality,” in Proceedings of AIST (2015), pp. 2465–2472.
A. A. Khlybov and E. L. Vorozheva, “Influence of an initial as-cast structure on the quality of hot-rolled products of hypoeutectoid steel,” Vestn. Magnitogorsk Gos. Tekh. Univ. 19 (1), 48–59 (2021). https://doi.org/10.18503/1995-2732-2021-19-1-48-59
GOST R 54153–2010. Steel. Atomic Emission Spectral Analysis (Standartinform, Moscow, 2012).
V. V. Moshkunov, A. M. Stolyarov, and A. S. Kazakov, “Reduction of the axial chemical heterogeneity of pipe steel as a result of soft compression of a continuously cast slab,” Vestn. MGTU, No. 2, 24–25 (2012).
E. A. Krylova, A. M. Stolyarov, V. V. Moshkunov, and M. V. Potapova, “Chemical inhomogeneity of a continuously cast slab made of low-sulfur pipe steel,” Teor. Tekhnol. Metallurg. Proizv., No. 1, 20–22 (2017).
A. I. Razgulin, D. N. Chikishev, and A. N. Zavalishchin, “Transformation of chemical inhomogeneity (segregation) during plate rolling of microalloyed pipe steels,” Modelir. Razvit. Prots. OMD, No. 23, 44–49 (2017).
L. V. Agamirov, V. L. Agamirov, and V. A. Vestyak, “Distribution of the coefficient of variation in the problems of statistical analysis of tests,” Software & Systems 31 (1), 166–171 (2018).
A. A. Kazakov, O. V. Pakhomova, and E. I. Kazakova, “As-cast structure of an industrial slab with a ferritic–pearlitic structure,” Chern. Metally, No. 11, 9–15 (2012).
A. V. Kudrya, E. A. Sokolovskaya, E. A. Vodop’yanov, et al., “Joint influence of multiscale structures on steel product quality oscillation,” in Bernshtein Readings on Thermomechanical Treatment of Metallic Materials (Izd. MISiS, Moscow, 2006).
N. I. Khvorinov, Solidification and Heterogeneity of Steel (Mashgiz, Moscow, 1958).
E. V. Borodina and O. I. Glotova, “Dendritic heterogeneity of steel ingots,” in Proceedings of 5th International Conference of Students and Young Scientists (Kursk, 2020), pp. 216–219.
Yu. A. Panchenkova, “Factors determining the dispersion of the dendritic structures of steel,” in Challenging Problems of Aviation and Cosmonautics (2012), pp. 126–127.
V. A. Efimov, Formation of Steel Ingot (Metallurgiya, Moscow, 1986).
V. A. Efimov and A. S. El’darkhanov, Modern Technologies of Casting and Solidification of Alloys (Mashinostroenie, Moscow, 1998).
G. V. Levchenko, E. G. Demina, S. A. Vorobei, and E. E. Nefed’eva, “Estimation of the deformed state of a metal using changes in the parameters of a dendritic structure,” Metallurg. Gornorud. Prom., No. 5, 71–75 (2009).
V. S. Kovalenko, Metallographic Reagents: A Handbook (Metallurgiya, Moscow, 1981).
GOST 5639–82. Steels and Alloys. Methods of Revealing and Determining Grain Size (IPK Izd. Standartov, Moscow, 2003).
C. Bernhard, J. Reiter, and H. Presslinger, “A model for predicting the austenite grain size at the surface of continuously-cast slabs,” Met. Mater. Trans. B 39 (December), 885–895 (2008).
A. V. Chastukhin, “Laws of austenite recrystallization processes and improvement of the technology of controlled rolling of microalloyed high-cold-resistance tube steels,” Cand. Sci. (Eng.) Dissertation, Moscow, 2017.
N. V. Malakhov, G. D. Motovilina, E. I. Khlusova, and A. A. Kazakov, “Structural heterogeneity and methods of its decreasing to improve the quality of structural steels,” Vopr. Materialoved., No. 3 (59), 52–64 (2009).
J. F. Nott, “Dependence of impact strength on microstructure,” in Proceedings of Conference on Steels for Gas Pipes and Fittings (Metallurgiya, Moscow, 1985).
M. L. Bernstein and A. G. Rakhshtadt, Physical Metallurgy and Heat Treatment of Steel. Vol. 2. Fundamentals of Heat Treatment (Metallurgiya, Moscow, 1983).
A. V. Supov, V. P. Kanev, and P. D. Odesskii, et al., Physical Metallurgy and Heat Treatment of Steel and Cast Iron: A Handbook. Vol. 3. Heat and Thermomechanical Treatment of Steel and Cast Iron, Ed. by A. G. Rakhshtadt, L. M. Kaputkina, S. D. Prokoshkin, and A. V. Supov (Internet Inzhiniring, Moscow, 2007).
Author information
Authors and Affiliations
Corresponding authors
Ethics declarations
The authors declare that they have no conflicts of interest.
Additional information
Translated by K. Shakhlevich
Rights and permissions
About this article
Cite this article
Vorozheva, E.L., Kudashov, D.V., Khlybov, A.A. et al. Methods for Studying the Structural State of Continuously Cast Slabs and the Hot-Rolled Metal Produced at the Casting and Rolling Complex. Russ. Metall. 2022, 496–504 (2022). https://doi.org/10.1134/S003602952205010X
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S003602952205010X