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结合国内某钢厂360 mm×450 mm大方坯连铸的实际生产工艺,利用商用有限元软件MSC.MARC对连铸大方坯自然热收缩行为进行三维热力耦合模拟。本次有限元模拟采用热弹塑性模型,研究不同拉速下铸坯温度场与凝固收缩规律。研究结果表明:拉速越高,温度变化越慢,铸坯总收缩量越小;拉速越小,温度变化越快,铸坯总收缩量越大;铸坯在宽度方向和厚度方向表现出不同规律的自然热收缩行为。
According to the actual production technology of continuous casting of 360 mm × 450 mm bloom in a steel mill in China, the natural thermal shrinkage behavior of the continuous casting bloom was simulated by the three-dimensional thermodynamic coupling method using commercial finite element software MSC.MARC. The finite element simulation using thermal elasto-plastic model to study the casting speed and solidification shrinkage law under different casting speed. The results show that the higher the pulling speed, the slower the temperature change, the smaller the total shrinkage of the billet; the smaller the pulling speed, the faster the temperature changes, the greater the total shrinkage of the billet; the billet shows in the width and thickness directions Different laws of the natural heat shrinkage behavior.