Energy power parameter effect of hot rolling on the formation of the structure and properties of low-alloy steels

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.247269

Keywords:

Hensel-Spittel formula, hot deformation, physical modeling, power parameters, ferrite

Abstract

The temperature and degree of hot deformation for steel 10HFTBch have been determined. This made it possible to ensure an increase in the mechanical properties of this steel, namely, the ultimate strength up to 540–560 MPa, as well as the relative elongation up to 25–29 %. As a result, it became possible to increase the service life of wheels with increased carrying capacity. This, in turn, will make it possible to increase the load of the transported cargo by motor vehicles several times.

The mechanism of the influence of the energy-power parameters of rolling on the formation of the macro- and microstructure of a two-phase steel in the process of hot deformation is disclosed. The applied scheme provided an increase in the homogeneity of the structure of the developed steel, which saved the central part of the rolled section from overheating. It has been established that a decrease in the temperature of the end of deformation leads to a decrease in the size of the recrystallized austenite grain, and, consequently, to a refinement of the ferrite grain. Also an important factor in preventing the growth of ferrite grains in the upper part of the ferritic region is the abolition of cooling of the steel in coils.

The recommended mode for multicomponent alloy steel 10HFTBch is as follows: the temperature of the end of rolling is 850 °C, the beginning of accelerated cooling is 750 °C, and the temperature of strip coiling into a coil is 600 °C.

The basis for ensuring the increased strength of two-phase steels is the ratio and distribution of structural fractions – ferrite (initial and precipitated from austenite), as well as martensite. When hardened by such traditional "martensite formations" as manganese, the ability to control properties is limited. This is reflected in a narrow range of variation in the strength and ductility of the developed steel. The optimal combination of strength characteristics of plastic properties reduces the metal consumption of the product by 15–25 %.

Author Biographies

Sergey Sheyko, Zaporizhzhia National University

PhD, Associate Professor

Department of General and Applied Physics

Anton Matiukhin, Zaporizhzhia Polytechnic National University

PhD, Associate Professor

Department of Metal Forming

Volodymyr Tsyganov, Zaporizhzhia Polytechnic National University

Doctor of Technical Sciences, Associate Professor

Department of Metal-Cutting Machines and Tools

Andrey Andreev, Zaporizhzhia National University

Doctor of Pedagogical Sciences, Associate Professor

Department of General and Applied Physics

Anna Ben, Zaporizhzhia Polytechnic National University

Senior Lecturer

Department of Metal Forming

Elena Kulabneva, Zaporizhzhia Polytechnic National University

Senior Lecturer

Department of Theory and Practice of Translation

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Published

2021-12-22

How to Cite

Sheyko, S., Matiukhin, A., Tsyganov, V., Andreev, A., Ben, A., & Kulabneva, E. (2021). Energy power parameter effect of hot rolling on the formation of the structure and properties of low-alloy steels . Eastern-European Journal of Enterprise Technologies, 6(12 (114), 20–26. https://doi.org/10.15587/1729-4061.2021.247269

Issue

Vol. 6 No. 12 (114) (2021): Materials Science

Section

Materials Science

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Copyright (c) 2021 Sergey Sheyko, Anton Matiukhin, Volodymyr Tsyganov, Andrey Andreev, Anna Ben, Elena Kulabneva

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