Computer Model STAN 2000 and its Use in Practice of Steels Hot Rolling on Mill 2000 of Severstal

Abstract

An integral computer model/program STAN 2000 for simulation of steels hot rolling on mill 2000 of SEVERSTAL was developed. The capacity of the model includes, for example, the following features:‒ control of power parameters and prediction of hot strip temperature for a given rolling and accelerated cooling regimes;‒ follow-up of the evolution of steel microstructure at all stages of strip production and prediction of ultimate mechanical properties (yield stress, ultimate tensile stress and relative elongation);‒ optimization of rolling regimes for existing steel grades and developing them for a new ones.The STAN 2000 program is written in С++ programming language and can work on all modern Microsoft Windows family operating systems. The program has a well-designed and user-friendly interface facilitating its practical use.The integral model was calibrated using an extensive data base on rolling regimes and forces, measured temperatures and final mechanical properties for a number of steel grades rolled on mill 2000 of SEVERSTAL with chemical compositions covering the following ranges of alloying elements content (mass.%): С(≤0.65); Mn(≤2.0); Si(≤1.0); Cr(≤0.9); Ni(≤0.6); Cu(≤0.5); Mo(≤0.4); Nb(≤0.05); V(≤0.065); Ti(≤0.06); B(≤0.003).Some results of calculations performed with STAN 2000 program for temperatures, rolling forces and mechanical properties are presented and compared with experimental data. Some examples of the program utilization in hot strip production on mill 2000 of SEVERSTAL are presented and discussed.

PyRolL - An Extensible OpenSource Framework for Rolling Simulation

“…Besides the approach of tracing the groove rolling back to an equivalent flat rolling pass, there were also investigations focusing on the modelling of material flow, including the actual shape of the groove (Goldhahn, 1981;Hensel & Goldhahn, 1981;Hensel & Spittel, 1978;Kopp et al, 1985;Mauk & Kopp, 1982). To make optimum use of these models, attempts to automatic groove pass design were always an issue of development (Betshammer, 2006;Eriksson, 2004Eriksson, , 2005Eriksson & Lundberg, 2004;Hensel, 1987;Hensel & Großmann, 1987;Hensel & Wehage, 1988;Körmer, 1987;Krause et al, 2007;Kunzman, 1977;Lambiase & Langella, 2009;Malmgren, 2000;Ogoltcov et al, 2015;Overhagen, Braun, Gamal, et al, 2020;Overhagen, Braun, & Deike, 2020;Overhagen, 2021;Schmidt, 1997;Schmidtchen et al, 2020;Schmidtchen & Prahl, 2021). An exhaustive overview of general tasks in roll pass design and published models is given by Oduguwa & Roy (2006).…”

Formulas for the Calculation of Temperatures and Concentrations of Carbon Responsible to the Parar Equilibrium of the Main Phases in Medium Sheet Steels

“…The obtained formulas for equilibrium carbon concentrations in ferrite and austenite are successfully used in integral mathematical models of hot rolling [3,7], providing the necessary accuracy of modeling the process of austenite decomposition during its continuous cooling for practically important steels with a wide range of chemical composition changes.…”

“…In recent years, in the practice of modern industrial production of hot-rolled steel sheet, quantitative integral mathematical models ("through" models) of hot rolling [1][2][3][4][5][6], capable of predicting the final microstructure of steel and its mechanical properties, find effective use. The use of such models allows you to optimize rolling conditions and chemical compositions of existing steels, as well as develop new steels and their rolling conditions with minimal expenditure of material and time resources, thus providing a significant economic effect.…”

Steel Production Technology Development for the Manufacture of Pipes Used in the Extraction and Transportation of Petroleum Products

“…In this work, was described the solutions that made it possible to obtain the target steel structure -acicular ferrite and granular bainite, without axial segregation in the central part along the strip thickness. The achieved results were obtained with minimal costs due to the active use of the previously developed integrated computer model STAN 2000 [7]. The calculations made it possible to propose temperature and deformation regimes that provide minimal structural heterogeneity in the thickness of the hot-rolled strips and high corrosion resistance of the developed steel.…”