双辊薄带铸轧过程中工艺参数对中心层偏析有重大影响,针对双辊薄带铸轧机的特点,利用多相流技术建立完全耦合溶质场、流场、温度场的数学模型,对铸轧熔池中液相-液固两相-固相同时存在的复杂凝固过程进行模拟仿真,研究分析铸轧熔池中Mg、Si元素溶质场与流场分布特征,对比研究不同工艺参数(浇铸温度、辊缝宽度)对铸轧薄带中心层偏析的影响规律,并结合铝合金6061的铸轧实验对结论进行验证.%The technical parameters of twin-roll strip casting have significant impact on the centerline segregation. The mathematical model in completely coupled temperature field, flow field and solute field was established by using multiphase flow technology for the characteristics of twin-roll strip casting mill. The solidification process of simultaneous existence of liquid phase, liquid-solid-phase and solid phase in molten pool was simulated based on the coupled mathematical model. The distribution characteristics of Mg and Si solute field and flow field in the molten pool were studied by the simulation results, and the influence of different technical parameters (the width of the roll seam and casting temperature) on the centerline segregation of the thin strip was studied. The research conclusion was verified by the casting and rolling experiments of the aluminum alloy 6061.
展开▼
