Abstract: 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.

Key words: continuous unidirectional solidification%mould%solid-liquid interfacial position