Bauman Moscow State Technical University, Moscow, Russia

A. G. Zinyagin, Cand. Eng., Associate Prof., e-mail: ziniagin_ag@bmstu.ru
A. V. Muntin, Cand. Eng., Associate Prof., e-mail: muntin_av@bmstu.ru
A. P. Stepanov, Graduate Student, e-mail: andreywester24@gmail.com
N. R. Borisenko, Graduate Student, e-mail: borisenko_nr@bmstu.ru

Clad rolled products with a base layer of carbon or low-alloy steel and a cladding layer of corrosion-resistant steel meet the requirements for operational reliability and allow them to be used instead of stainless steels and non-ferrous metals or to extend the service life of ferrous metals in various infrastructure facilities. However, the production of clad steel is accompanied by the need to consider various features of the process due to asymmetric conditions in the deformation zone. The reason for the asymmetry lies in the difference of layer thicknesses ratio, different flow stress of the layers, different friction coefficients, etc. The purpose of this work is to develop a mathematical model of the rolling process on a laboratory mill, to adapt the model based on experimental data, to determine the effect of rolling process parameters and parameters of a clad billet on the features of its shaping. To achieve this goal, the following tasks were solved: determination of the rheological properties of steels of the base and cladding layers in a wide range ofdeformations, deformation rates and temperatures on the Gleeble machine, creation of a finite element model of clad samples rolling process, laboratory rolling of samples at various deformation parameters, adaptation of the model and comparison of simulation results with the results of laboratory tests, analysis of dependencies obtained using the model. The article shows that with an increase in reduciton of more than 20%, the uneven deformation of the layers decreases due to the greater penetration of compressive stresses through the thickness of the rolled product. To analyze the deformation unevenness, a relative deformation coefficient is proposed, which is in the range of 1.00–1.08 for the considered combinations of materials.

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