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利用改进的Monte Carlo模型建立动态定向凝固抽拉过程的温度场计算模型,简化并得到了影响温度场的主要角度参数。通过理论计算和模拟仿真研究了抽拉速度、模壳与炉壁的相对位置,以及模组数量等工艺因素与角度参数之间的关联,从而获得其对温度场变化的影响规律。结果表明,抽拉速度增大,单位时间内可视角增幅变大,模壳散热能力增强;模壳上散热单元与炉壁的可视角增大,辐射散热能力增强;模组上试棒数量增多,模壳远炉壁一侧散热空间减小,散热能力减弱。
The improved Monte Carlo model was used to establish the temperature field calculation model of dynamic directional solidification drawing process, and the main angle parameters affecting the temperature field were simplified and obtained. Through theoretical calculation and simulation, the relationship between drawing speed, relative position of mold shell and furnace wall and the number of modules and the angle parameters was studied, and the influence of temperature on the variation of temperature field was obtained. The results show that the drawing speed increases and the visual angle increase per unit time increases, and the cooling capacity of the mold shell increases. The viewing angle of the cooling unit and the furnace wall on the mold shell increases, and the radiation cooling capacity increases. The number of test rods on the module increases , Mold shell side wall to reduce the cooling space, cooling capacity weakened.