Abstract
The heat transfer and temperature distribution of continuous casting wide-thick slab are different from the conventional one due to its section size and equipment, where the slab corner transverse crack could be caused by unreasonable distribution of transverse secondary cooling water. In this paper, a heat transfer model was developed to analyze the temperature distribution of wide-thick slab while the actual water flux distribution along the slab transverse surface was measured and applied as the boundary conditions to secondary cooling in the calculations. The temperature of micro-alloyed steel slab under two typical casting conditions of lower casting speed and narrower slab width were simulated and analyzed, and the nozzles arrangement were optimized accordingly. Finally, the plant results with the optimized arrangement showed that the defect rate of the rolled plate corner and edge cracks was reduced from 12.6% to 3.5%.
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