Abstract Nonuniform temperature field at cross section of profiled billets during conventional continuous casting always results in serious defects and inhomogeneous microstructures. In this paper, a 3D temperature controlled mold continuous casting (TCMCC) model for preparing profiled copper strip was established and verified to calculate the magnetic and temperature field during continuous casting process. Under different controlled temperatures of TCM and casting speeds, the temperature fields in the TCM and melt were numerically calculated, and the variation of temperature fields in the mushy zone was analyzed. The calculated temperatures are in good agreement with the measured values. The results indicate the uniformity of temperature gradient (uG) at the profiled section improves significantly when the controlled temperature of TCM is higher than the liquidus temperature of alloy, further, the uG gradually reaches the minimum and then increases with increasing casting speed. Based on the calculated results, the profiled KFC copper alloy strips with good surface quality were successfully prepared by the TCMCC under controlled TCM temperature of 1423 K and casting speeds of 15–60 mm/min. The value of the uniformity of primary dendrite spacing at the cross section of the profiled strips reaches the minimum with the casting speed of 45 mm/min.

中文翻译：

---

温控结晶器连铸异型铜合金带材时的热特性及显微组织均匀性

摘要 常规连铸过程中异型坯截面温度场不均匀，往往导致严重的缺陷和组织不均匀。在本文中，建立并验证了用于制备异型铜带的 3D 温控结晶器连铸 (TCMCC) 模型，以计算连铸过程中的磁场和温度场。在不同的TCM控温和浇铸速度下，数值计算了TCM和熔体中的温度场，分析了糊状区温度场的变化。计算出的温度与测量值非常吻合。结果表明，当TCM控制温度高于合金液相线温度时，异型截面的温度梯度均匀性(uG)显着提高，并且随着拉速的增加，uG逐渐达到最小值然后增加。根据计算结果，TCMCC 在控制 TCM 温度 1423 K 和 15-60 mm/min 的铸造速度下成功制备了具有良好表面质量的 KFC 铜合金异型带。当拉速为45 mm/min时，异型带材横截面一次枝晶间距的均匀性达到最小值。在控制 TCM 温度 1423 K 和 15-60 mm/min 的铸造速度下，TCMCC 成功制备了具有良好表面质量的 KFC 异形铜合金带材。当拉速为45 mm/min时，异型带材横截面一次枝晶间距的均匀性达到最小值。在控制 TCM 温度 1423 K 和 15-60 mm/min 的铸造速度下，TCMCC 成功制备了具有良好表面质量的 KFC 异形铜合金带材。当拉速为45 mm/min时，异型带材横截面一次枝晶间距的均匀性达到最小值。