An integral computer model/program for simulation of steels hot rolling on mill 2000 of SEVERSTAL was developed. The model provides for the following calculations: · temperature distribution over the cross section of a rolled strip at any location along its length; · rolling forces and torques;austenite microstructure evolution under hot rolling taking into account grain growth, dynamic/static recrystallization and strain induced carbonitrides precipitation; · austenite transformation during accelerated strip cooling at the run-out table accounting for formation of polygonal ferrite, pearlite, bainite of different morphology, and martensite; · mechanical properties of rolled strips (yield stress, ultimate tensile stress and relative elongation). The present model was calibrated using an extensive data base on rolling regimes and energy-force parameters, 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: С(≤0.65); Mn(≤2.0); Si(≤1.0); Cr(≤0.9); Ni(≤0.6); Cu(≤0.5); Mo(≤0.4); Nb(≤0.08); V(≤0.08); Ti(≤0.08) (mass.%). The calculation results for temperatures, rolling forces and mechanical properties are in good agreement with the experimental data. The computer program STAN 2000 has a well-designed and user friendly interface. The program is widely used in industrial strip production on mill 2000 of SEVERSTAL for working out new and optimizing existing hot rolling and accelerated cooling regimes.Keywords: modeling, microstructure, mechanical properties, steels, hot rolling
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