Formation Mechanism and Control Technology of Transverse Corner Cracks During Slab Continuous Casting of Micro‐alloyed Steels

Micro‐alloyed steel with Nb, V, Ti and other alloying elements is one of the important steel grades in steel industry. During continuous casting process, high occurrence rate of transverse corner cracks in slabs restricts the quality and efficiency of the production of micro‐alloyed steel grades, and it has not been effectively solved for a long time. In this paper, the research progress on the formation mechanism, influential factors and typical control technologies of transverse corner cracks during slab continuous casting are reviewed. Considering high‐temperature solidification process of micro‐alloyed steel, the control of growth of microstructures and the precipitation behavior of carbonitrides in slab corners are supposed to be the key to avoid transverse corner cracks during slab continuous casting.

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