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Rolling
ArticleName Development of measures to reduce longitudinal bending of thick clad and alloyed steel plates during hot rolling
DOI 10.17580/cisisr.2025.01.10
ArticleAuthor A. G. Zinyagin, N. R. Borisenko, A. P. Stepanov, M. O. Kryuchkova
ArticleAuthorData

Bauman Moscow State Technical University (Moscow, Russia)

A. G. Zinyagin, Cand. Eng., Associate Prof., e-mail: ziniagin_ag@bmstu.ru
N.R. Borisenko, Postgraduate Student, e-mail: BorisenkoNikita17@yandex.ru
A. P. Stepanov, Postgraduate Student, e-mail: Stepanov_ap@bmstu.ru
M. O. Kryuchkova, Senior Lecturer, e-mail: mariya.mironova@bmstu.ru

Abstract

This article investigates methods for preventing longitudinal bending of the workpiece during hot rolling of thickplate alloyed and clad steel at an industrial plate mill. The main problem addressed is the occurrence of uncontrolled bending, which leads to geometric defects, equipment damage, and the need for premature removal of rolled plate. The key contributing factors are identified, including temperature gradients, differences in friction conditions between the upper and lower surfaces of the workpiece, and deformation asymmetry caused by various reasons (e.g., differing properties of the base and cladding layers for clad steel, different roll diameters, etc.). The study employed comprehensive analysis methods, including laboratory experiments using a Gleeble simulator and a two-high rolling mill, as well as mathematical modeling of the rolling process using the finite element method (FEM). It was found that localized cooling (e.g., descaling sprays at the mill entry and exit) has limited effectiveness due to shallow penetration depth. The most effective solution was the creation of a linear temperature gradient of 40 °C across the slab thickness during furnace heating. Industrial trials confirmed that combining gradient heating with automatic roll speed adjustment and the use of descaling sprays in the mill effectively minimizes workpiece bending without compromising the mechanical properties of the final product.

keywords Hot rolling, asymmetric rolling, high-alloy steels, clad rolled products, clad steel plate, mathematical modeling, temperature gradient, scale, finite element method, rheological properties
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