材料期刊网

随着连铸技术的进步和对产品质量要求的提高，结晶器锥度的优化设计已被越来越多的学者和生产者所关注。采用有限元方法对150小方坯结晶器的锥度进行了优化，首先建立二维非稳态热力耦合模型，模拟计算铸坯在结晶器中的凝固收缩；通过建立三维的结晶器热力耦合模型，计算出结晶器铜管的变形，并在此基础上设计了结晶器的最佳锥度。结果表明，对于150小方坯，在拉速为2.50m/min时，应采用三锥度结晶器，并且结晶器铜管的变形可以忽略不计，其锥度主要取决于铸坯的收缩特性。

With the advancement of the casting process and to meet the demand of the quality, more and more expert and producer have been concerned about the optimization of the mould taper. In this study, thermal-mechanical finite element model is applied to optimize the mould taper of 150 billets. 2D transient conduction equation has been established to simulate the shell growth and shrinkage of the shell；a 3D thermal-mechanical finite element model has been established to optimize the mould taper, Based on this foundation the curve taper mould has been designed. The result shows that when the casting speed is 2.5m/min, multiplicity mould taper should be adopted, and the distortion of the mould makes little effect on the taper of the mould ,the taper of the mould mostly depend on the shrinkage of the shell.