DOI: 10.18503/1995-2732-2021-19-3-102-108
Abstract
An important factor of a hot rolling process is a thermal state of steel in the mill line. The development of feasible temperature and speed schedules for heating slabs and producing strips requires a large number of experiments, time and costs. Therefore, to solve problems aimed at manufacturing finished products with a given set of properties, we need to apply a modern approach to carrying out research. One of these methods is a combined use of physical and mathematical modeling. This paper presents the results of experimental studies on a heating process of steel samples made from slabs of current production in order to specify thermophysical coefficients of steel grade 17GS. The samples were stepwise heated in a muffle furnace and soaked to achieve a uniform temperature over the sample volume; as a result, the authors obtained time-temperature curves. Physical modeling in DEFORM-3D was used to develop a mathematical model of heating steel, repeating laboratory research, in order to check adequacy of the model. Using the research results, the authors simulated the thermal state of steel in the hot rolling mill line. The simulation was carried out in two stages: the first one was heating a slab before hot rolling; the second one was hot rolling in roughing stands. The surface temperatures obtained during the simulation and compared with the readings of a pyrometer after the 5th stand showed a difference not exceeding 15ºС, which indicated adequacy of the model. The developed mathematical model is adequate and can be used to simulate the thermal state of steel during the formation of non-uniform properties of long products.
Keywords
Laboratory research, mathematic modeling, heating, rolling, thermal state, DEFORM-3D.
For citation
Levykina A.G., Gorbunov K.S., Pozdnyakova A.I., Solovyov V.N. Study on a Thermal State of Steel Using Methods of Physical and Mathematical Modeling. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2021, vol. 19, no. 3, pp. 102–108. https://doi.org/10.18503/1995-2732-2021-19-3-102-108
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