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论文类型：期刊论文

发表时间：2010-07-01

发表刊物：IRONMAKING & STEELMAKING

收录刊物：SCIE、EI、Scopus

卷号：37

期号：5

页面范围：341-346

ISSN号：0301-9233

关键字：Continuous casting; Square mould; Shrinkage; Numerical simulation; Steel billet

摘要：A transient, thermoelastic-viscoplastic finite element model has been applied using ANSYS to study the thermal and mechanical behaviour of the solidifying shell during continuous casting of steels. In the model, a gap dependent heat transfer condition was imposed in the boundary between shell and mould. Thermophysical properties (e. g. thermal linear expansion) depending on temperature and composition were derived from experiment data and empirical correlations. Continuous casting of square billets with different steel grades, B72LX and ER70S6, were simulated to investigate the evolution of shell temperature, stress and shrinkage with an indirect coupled approach. The results indicated that carbon content, pouring temperature and casting speed have obvious influence on shrinkage of billets. According to shrinkage compensating principle, the mould taper and inner cavity geometry were designed and optimised based on average shrinkage histories of the solidifying shell. The new design has performed well in industrial trials.