Research On Modeling And Optimization Method Of Continuous Casting Process Based On Finite Element

The continuous casting process is a crucial link in metallurgical manufacturing.Among them,the secondary cooling process is particularly critical.Many quality defects such as surface cracks,longitudinal cracks,and bulge deformation are closely related to this area.Therefore,the cooling effect and optimized control of the secondary cooling zone are the quality assurance for continuous casting production.In recent years,the demand for high-quality wide and thick slabs in military,aerospace,shipbuilding and other fields has greatly increased,and the requirements for continuous casting technology are also increasing.Therefore,research on continuous casting production process technology has important theoretical and economic value.First,according to the basic theory of slab solidification and heat transfer,combined with boundary conditions and steel type thermal physical parameters,a numerical model of continuous casting slab solidification heat transfer is established.On the basis of the heat transfer model,a continuous casting slab stress model is established in combination with the high temperature mechanical properties of the slab.The finite element method is used to solve the model,which provides a basis for the subsequent simulation analysis of the solidification heat transfer process.Secondly,the accuracy of the model was verified by two methods: infrared temperature measurement and on-site nail shooting experiment.On this basis,the finite element software ANSYS was used to simulate the solidification heat transfer model,and the different water volume and pulling speed were analyzed.The surface and center temperature changes of the slab and the growth of the slab are compared,and the influence of different production process conditions on the slab temperature and the growth rate of the slab are compared,and the stress changes at key positions of the slab under different process conditions are simulated and analyzed.,To provide guidance on the continuous casting production process.Finally,an improved artificial bee colony algorithm-CGABC based on crossover operation is proposed,and the efficiency of the three algorithms ABC,GABC and CGABC is compared using MATLAB soft simulation analysis.Taking the continuous casting metallurgical criteria,the amount of secondary cooling water and the surface temperature of the slab as the goals,and considering the value function of the metallurgical criteria such as temperature limitation,liquid core length limitation and bulge limitation in the continuous casting production process,a new method is proposed.The continuous casting process optimization method based on the cross-operation artificial bee colony algorithm is used to analyze and discuss the optimized water volume and the surface temperature of the cast slab.