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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical analysis of twin-roll casting to fabricate a laminated sheet from melts
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Numerical analysis of twin-roll casting to fabricate a laminated sheet from melts

机译：双辊铸造由熔体制备层压板的数值分析

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摘要

Two types of twin-roll casting process to fabricate a laminated sheet were numerically analyzed in two dimensions. In Type I, which is asymmetric, melts of Mg-AZ31 and aluminum alloy are solidified into a two-layer laminated sheet. In Type II, which is symmetric, these melts are solidified into a three-layer laminated sheet. Assuming the viscosity of a melt and the proportional constant of the flow rule of a Mises material to be equivalent, the rigid-thermoviscoplastic finite-element method was applied to these analyses. As a result, occurrence of buckling and thickening in the clad layer and incomplete solidification in the base layer were predicted as potential problems of the processes. The former was resolved by modifying the separator profile as well as by inducing incomplete solidification in the base layer near the roll exit The latter was resolved by a subsequent cooling process with pressure rolls, which enhance the bonding strength at an interface and collapse potential voids that would occur during solidification. Details of flow, temperature distribution, solidification, roll torque and roll-separating force were obtained from the analyses.
机译：二维地分析了两种类型的双辊铸造工艺来制造层压板。在不对称的类型I中，Mg-AZ31和铝合金的熔体被固化成两层的层压板。在对称的II型中，这些熔体被固化成三层层压板。假设熔体的粘度和Mises材料的流动规律的比例常数相等，则将刚性-热塑塑性有限元方法应用于这些分析。结果，预测在包层中发生屈曲和增厚以及在基层中不完全固化是该过程的潜在问题。前者通过修改隔板轮廓以及通过在辊出口附近的基层中引起不完全固化来解决。后者通过随后的加压辊冷却工艺解决，这增强了界面处的粘结强度并消除了可能的空隙在固化过程中会发生。从分析中获得了流动，温度分布，凝固，辊转矩和辊分离力的详细信息。

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