Mathematical Simulation Of Solidification Process And Solidification Structure Of Beam Blank Continuous Casting

Continuous casting cooling is very important in the production of slabs.The design of cooling parameters is unreasonable,and typical defects such as cracks,segregation and bulging are likely to occur inside the slab.Therefore,systematically explaining the heat transfer and solidification behavior of molten steel during the continuous casting process,scientifically analyzing and predicting the solidification structure of the continuous casting billet are of great significance to continuous casting production and quality control.Aiming at the heat transfer and molten steel solidification process of Q235 steel profiled blank continuous casting in a factory,a three-dimensional mathematical model of heat transfer,stress and solidification structure was established.Pro E was used to establish the model entity,and the solid model was meshed with Pro CAST software.The temperature field and stress field characteristics of the slab during solidification were systematically analyzed,and the solidification structure was simulated.the result shows,1.The amount of secondary cooling water is reduced from 1.65 L/kg to 1.05 L/kg,and the length of the two-phase zone at the end of solidification increases from 0.53 m to 0.83 m.The pouring temperature was increased from 1538°C to 1568°C in sequence,and the length of the two-phase zone at the solidification end was basically unchanged.The pulling speed gradually increased from 0.98 m/min to 1.12 m/min,and the length of the two-phase zone at the solidification end increased from 0.72 m to 1.38 m.2.The billet drawing speed is increased from 0.98 m/min to 1.12 m/min,and the effective stress at the corner of the casting billet is reduced from 35.7 Mpa to 23.7 Mpa,which is reduced by 12.2 Mpa.3.The amount of secondary cooling water decreased from 1.65L/kg to 1.05L/kg,and the equiaxed crystal ratio increased from 2.93% to 9.58%.The pouring temperature was increased from 1538°C to 1558°C,and the equiaxed crystal ratio was reduced from 12.87% to 3.08%.The pulling speed increased from 0.98 m / min to 1.09 m / min,and the equiaxed crystal ratio increased from 7.86% to 9.63%.Figure 38;Table 14;Reference 56...