Secondary Cooling Optimization for Slab Continuous Casting Based on Mathematical Model of Transient Heat Transfer
The crack is a common defect in continuous casting slab. The formulation of the reasonable secondary cooling process is an important measure to reduce the slab crack. Taking JBS275-B steel as an object, the secondary cooling process optimization for slab continuous casting was researched. A mathematical model of transient heat transfer for 2D slab was established based on the basic theory of solidification and heat transfer. Combining with the metallurgical principles in the secondary cooling zone, the aimed temperature of each end point on slab surface in the secondary cooling zone was determined according to the experimental curves of the high temperature plasticity. According to the formulation of aimed temperature on slab surface, the secondary cooling process was optimized. Finally, the slab cracks are eliminated.