铝铸轧铸嘴壁面复合传热分析

Analysis of Combined Heat Transfer in Nozzle Cavity Boundary for Aluminium Roll Casting

分析了铸嘴壁面复合传热方式，计算了不同导热系数和不同壁面厚度的壁面传热率，通过分析得出结论：铸嘴材料导热系数和铸嘴壁厚度尺寸对壁面传热率影响大，铸嘴型腔温度对壁画传热率影响小，对于同一材料和壁面厚度尺寸的铸嘴，常规铸轧和超薄快速铸轧的热损失基本相同。

A combined heat transfer in nozzle cavity boundary for aluminium roll casting was analysed. The boundary heat transfer density in different heat conductive coefficient and boundary gauge were calcaulated.The following conclusion were elicited by analyses: The boundary heat transfer density are affected to varying degrees by nozzle material's heat conduction coefficient and nozzle boundary gauge, and is varying small by nozzle cavity temperature. The heat loss as in the normal casting as in the thin-gauge high-speed casting for the same material and size.