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The nucleation can be enhanced by decreasing the superheat of molten steel, thus reducing temperature gradient on the solidification front can retard the growth of columnar crystals and enlarge the equiaxed zone in continuous casting strand. The billets with equiaxed zone more than 90% were cast with a combined mould and the heat flux was measured. The heat transfer of the combined mould and traditional mould was compared. The results show that under same casting conditions, the temperature gradient on the solidification front in the combined mould is smaller than that in traditional mould at a distance within 0-150 mm from the meniscus.
The nucleation can be enhanced by decreasing the superheat of molten steel, thereby reducing temperature gradient on the solidification front can retard the growth of columnar crystals and enlarge the equiaxed zone in continuous casting strand. The billets with equiaxed zone more than 90% were cast with a combined mold and the heat flux was measured. The heat transfer of the combined mold and traditional mold was compared. The results show that under the same casting conditions, the temperature gradient on the solidification front in the combined mold is smaller than that in traditional mold at a distance within 0-150 mm from the meniscus.