Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia

D. V. Konstantinov, Cand. Eng., Employee of the Research Sector, e-mail: const_dimon@mail.ru
A. G. Korchunov, Dr. Eng., Prof., Head of the Dept. of Design and Operation of Metallurgical Machines and Equipment
Yu. Yu. Efimova, Cand. Eng., Employee of the Institute for Nanosteels

Magnitogorsk Hardware and Calibration Plant MMK-Metiz, Magnitogorsk, Russia

A. Yu. Stolyarov, Cand. Eng., Chief Technology Specialist

Abstract: The article presents a comprehensive study of the structure and properties of steel reinforcement with periodic profile after stretching-bending with rebending based on laboratory tests of industrial samples obtained within existing production of OJSC MMK-Metiz, as well as computer multiscale modeling. Analysis of the mechanical properties showed the possibility of achieving class A500 for the type of reinforcement under study with the initial class A400. Microstructure studies revealed a heterogeneous structure of the steel, characterized by layered accumulations of pearlite grains in the longitudinal section of the samples. Taking into account the structural heterogeneity established for production samples, comparative computer multiscale modeling of the behavior under deformation conditions of an idealized microstructure with a uniform distribution of pearlite grains and a quasi-layered structure close to reality was carried out using SIMULIA Abaqus. Together with the analysis of the stress-strain state of various types of profiles in accordance with GOST 34028-2016, it was found that the resulting heterogeneity of deformation at the micro level summarized with the unevenness of the deformed state at the macro level due to the specific geometry of each individual profile.
The research was carried out with the help of a grant from the Russian Science Foundation (agreement No. 23-29-10046 dated 04.20.2023, https://rscf.ru/project/23-29-10046/) and financial support from the Government of the Chelyabinsk Region (agreement No. 588 dated 29.06.2023).

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