(西北工业大学 凝固技术国家重点实验室， 西安 710072)
摘 要: 基于傅立叶导热微分方程， 建立了薄板坯连铸过程中凝固传热的数学模型， 编制了预测连铸过程中温度场分布的计算机模拟程序。 利用该程序计算了不同拉速及冷却条件下， 铜薄板连铸过程中温度场的分布， 并分析了拉速、 冷却条件对铸坯温度的影响。 模拟结果表明： 拉速提高， 出坯温度明显升高， 因此为了防止拉漏， 关键是选择合理的拉速； 同时， 冷却条件也是影响结晶器温度场分布的重要工艺参数之一； 模型计算得出的铸坯温度与实测值基本相符， 温度误差在10 ℃以下， 计算结果可优化连铸工艺参数。
关键字: 薄板； 连铸； 温度场； 拉速； 冷却条件
（ State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China）
Abstract: A mathematical model to represent the solidification heat transfer process of thin-slab continuous casting and a computer simulation program based on Fourier conduction differential equation were worked out, which can be applied to predict the distribution of temperature field during the process of continuous casting. This program was applied to calculate the temperature distribution of copper thin-slab continuous casting with different casting speeds and cooling conditions. In the meantime, the effects of casting speed and cooling condition on thermal profile were studied. Simulation experiments show that the surface temperature out of the mould can be increased significantly by improving the casting speed. So in order to prevent the thin-slab from leaking, choosing casting speed correctly is a sticking point. Additionally, cooling condition is one of the important technological parameters as well as casting speed. The results show that the thermal profile calculated by mathe
matical model almost agrees with those obtained by experimental measurement, and the error is within 10 ℃.
Key words: thin-slab; continuous casting; temperature field; casting speed; cooling condition
