连续铸造过程的计算机建模与仿真分析

Computer Modelling and Simulation Analysis of Continuous Casting Process

应用热力学定律、流体力学理论和计算机仿真技术,建立关于连续铸造的弱形式对流传热模型和层流模型。模拟仿真结果表明,液固混合区面积、传导热通量都与相变温度宽度呈正相关关系,在液固混合边界区域附近其传导热通量最大,在模具外壁区域出现大的热通量;相变温度宽度越大,相变潜热值越平滑,相变温度宽度对模具内压强的影响不大。从提高连续铸造生产率角度出发,宜选用相变温度宽度较大的合金类材料和改变冷却方法,提高铸造生产效率,进而优化连铸工艺。

The weak form convection heat transfer model and laminar flow model about the continuous casting were build using the laws of thermodynamics, fluid＇ mechanics theory and computer simulation technology. The results show that both the area of solid-liquid mixed zone and conduction heat flux show positively correlated relationships with the width of phase change temperature, there is a largest conduction heat flux near the border of liquid-solid mixing area, and a larger heat flux appears at the mold wall area. The larger the width of phase transition temperature, the more smooth the phase change latent heat value, and the phase transition temperature width has less influences on the pressure of the mould. From the perspective of raising the productivity of continuous casting, choosing the appropriate alloy materials with larger phase change temperature width and changing cooling method can improve the efficiency of casting production, and optimize continuous casting process.