根据凝固原理建立了下引式连续定向凝固薄壁铜管过程中具有温度梯度的结晶器下二维稳态温度场的物理、数学模型,并通过数值计算与绝热结晶器、恒温结晶器下工艺参数对固液界面位置的影响进行对比分析,结果表明在保证熔体温度稳定的条件下,使用具有温度梯度的结晶器能够获得相对较宽的适宜工艺参数范围以及较高的极限拉坯速度.
Based upon the principle of downward continuous unidirectional solidification (DCUS) in the preparation of sheet copper tube, the physical and mathematical models of two-dimensional steady heat transfer for temperature field are established. By contrast the effect of process parameters on solid-liquid interfacial position with different type of mould, the calculated results show that it could get reletively wider process paremter range and higher casting speed at the steady melt temperature by using the mould with temperature gradient.
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