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基于现有的制备纤维增强铝基复合材料的方法,提出了一种连续纤维增强铝基复合材料板带铸轧控制成型方法。建立连续纤维与液态铝复合成型的分析模型,得到铝液的流动速度和铸轧辊与铝液间的换热系数对纤维增强铝基复合材料板带铸轧过程中铝液的流场、温度场和凝固场的影响。数值模拟结果表明:在铸轧区内,铝液温度快速下降,温度值快速达到固相线以下,流动速度变得很小;随着拉速增大,速度变化剧烈程度增大,铝液凝固速度变小,在同一点处的温度值增大;随着换热系数的增大,温度值减小,凝固速度加快,在同一点处的温度值减小,液相率降低。
Based on the existing methods for preparing fiber-reinforced aluminum matrix composites, a continuous fiber-reinforced aluminum-based composite strip casting and rolling control forming method is proposed. The analytical model of compounding of continuous fiber and liquid aluminum was established to obtain the flow velocity of molten aluminum and the heat transfer coefficient between casting roll and molten aluminum. And the influence of freezing field. The results of numerical simulation show that the temperature of molten aluminum drops rapidly below the solidus temperature and the flow velocity becomes very small in the casting zone. With the increase of casting velocity, the velocity of molten aluminum increases rapidly, As the heat transfer coefficient increases, the temperature decreases and the solidification rate increases. At the same point, the temperature decreases and the liquid phase decreases.