Abstract
Transverse cracking may occur in high strength low alloy CC slabs. This phenomenon is associated to a hot ductility trough resulting from intergranular ferrite that forms at the beginning of the γ-α transformation. Sumitomo has developed a hot tensile machine and a unique slab surface microstructure control process to improve hot ductility. The process based on controlled accelerated secondary cooling has been successfully implemented on Kashima n°2 caster.
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