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首先简要论述了结晶器内钢液凝固收缩的机理,然后介绍了近年来国内外有关方坯高拉速连铸结晶器的发展情况,概述了锥度曲线设计的类型和发展。综合考虑结晶器内坯壳凝固收缩特性以及前人在锥度设计方面的经验,本文根据某钢厂对结晶器铜管的设计要求,通过对铜管变形以及铸坯温度场的数值模拟,根据坯壳收缩以及铜管的变形规律来设计锥度曲线。所设计的锥度能够很好地适应坯壳的凝固收缩特性,为进一步提高拉速提供了基础。
First of all, the mechanism of solidification shrinkage of molten steel in mold is briefly discussed. Then the development of high speed continuous casting mold at home and abroad is introduced, and the type and development of taper curve design are summarized. Considering the solidification and shrinkage characteristics of the shell in the mold and the predecessors’ experience in the taper design, according to the design requirements of the mold copper tube in a steel mill and by the numerical simulation of the deformation of the copper tube and the temperature field of the slab, Shell shrinkage and deformation of brass to design the taper curve. The designed taper can well adapt to the solidification shrinkage characteristics of the shell, which provides a basis for further increasing the casting speed.