(大连理工大学 铸造工程研究中心， 大连 116024)
摘 要: 基于边界条件替换法建立了铝合金连续铸造喷水冷却过程的换热系数计算模型。采用实验测量铸锭冷却过程的表面温度和温度场数值计算相结合的方法，确定了铸锭表面温度为100～500 ℃和喷水密度为11.3～27.8 L/（m·min）时的换热系数，结果表明在不同的表面温度区间内，换热系数随着喷水密度增加而增大；当喷水密度相同时，随着铸锭表面温度升高，换热系数迅速降。
关键字: 连续铸造； 铝合金； 冷却/凝固控制； 换热系数
continuous casting of aluminum alloy
（Research Center of Foundry Engineering,
Dalian University of Technology, Dalian 116024, P.R.China）
Abstract:Based on the substitution method of boundary condition, a calculation model of the heat transfer coefficient in continuous casting of aluminum alloy during the process of water cooling was established, and the effects of surface temperature and cooling water density on heat transfer coefficient were analyzed. As a result, an empiric formula was founded by the mean square regression. The results show that when the surface temperature is in the range of 100～500 ℃, and cooling water density is in the range of 11.3～27.8 L/(m·min), the heat transfer coefficient increase with the increase of the cooling water density and the decrease of the surface temperature.
Key words: continuous casting; aluminum alloy; cooling/solidification control; heat transfer coefficient
