In this work, a three-dimensional model coupling fluid flow and heat transfer in the mold and a two-dimensional heat transfer model in secondary cooling zone was established to research slab corner temperature under different mold corner structure. Conclusions are as follow:
(1) The corner temperature at mold exit will be increased about 200 K through using chamfered mold. When the corner structure changed from big-chamfer to multi-chamfer or fillet, the rise of corner temperature is relatively small.
(2) In secondary cooling zone, the corner temperature of chamfered strand is about 100 K higher than that of right-angle strand, which will avoid the low ductility temperature zone during the straightening process. The corner temperature of big-chamfered strand, multi-chamfered strand and fillet strand increases in turn, but the increase amplitude is relatively small.
(3) The strand surface temperature of multi-chamfered and fillet strand along the strand cross section shifts relatively smoothly, which will decrease the thermal stress.
Acknowledgements The work is financially supported by the Natural Science Foundation of China, Project No. 51374260 and 51611130062.