摘要
建立结晶器内方坯的热力耦合模型，采用间接耦合的数值模拟方法，分析拉速对结晶器内铸坯的温度场、等效应力分布及坯壳凝固收缩的影响，结果表明，在一定条件下，拉速越快，铸坯的整体温度越高，铸坯所受的等效应力及铸坯的凝固收缩越小。同时，在铸坯的同一横截面上，铸坯凝固收缩不均匀，铸坯角部的温度最低，所受的等效应力最大。
A thermal-mechanical coupling model was established to analyze the billet in continuous casting mould by means of indirect coupling method, and the influence of casting speed on temperature field, the equivalent stress distribution and solidification shrinkage of casting billet in mould had been analyzed. The results indicated that it was the faster the casting speed, the higher the whole temperature, the smaller the equivalent stress and solidification shrinkage of casting billet under a certain condition. Meanwhile, in the same cross-section of the billet, the solidification shrinkage of billet was uneven, and the lowest temperature, the maximum equivalent stress was endured on the comer of billet.
关键词
方坯
耦合分析
温度
等效应力
凝固收缩
billet
coupling analysis
temperature
equivalent stress
solidification shrinkage
