包铜钢线热浸镀过程的简化模型

在钢线热镀Ｃｕ实验基础上，建立简化的动态数学模型，模拟反向凝固的工艺过程，研究主要工艺参数影响的规律，以模拟参数的形式描述界面处的接触热阻，合理地反映了铜液和钢芯之间的热交换过程，区域的离散采用内接点法，相变潜热的描述采用热焓法，温度和焓的增加都作为求解变量，这些措施使得凝固前沿的确定不受网格的限制，此简化模型可作为在线控制算法的基础。

SIMPLIFIED MODEL OF HOT DIPPING PROCESS OF COPPER-COATED STEEL WIRE

Based on the hot dipping experiment of copper-coated steel wire, a simplified dynamic mathematical model is developed to simulate the process of inverse casting. The influence of chief technology parameters on the process is investigated. Adopting the simulate parameter method, the thermal resistance on the interface is described, and the heat transfer between copper melt and steel wire is reasonably simulated. As for the domain discretization, the method of internal point is used. The thermal enthalpy method is adopted to model the latent heat in phase change, both the temperature and enthalpy increase are taken as object variables, so that moving of the solidification front is independent of the grid distribution during the computation. Based on this simplified model, an algorithm for on-line control can be derived easily.