(大連理工大學(xué) 鑄造工程研究中心， 大連 116024)
摘 要: 基于邊界條件替換法建立了鋁合金連續(xù)鑄造噴水冷卻過(guò)程的換熱系數(shù)計(jì)算模型。采用實(shí)驗(yàn)測(cè)量鑄錠冷卻過(guò)程的表面溫度和溫度場(chǎng)數(shù)值計(jì)算相結(jié)合的方法，確定了鑄錠表面溫度為100～500 ℃和噴水密度為11.3～27.8 L/（m·min）時(shí)的換熱系數(shù)，結(jié)果表明在不同的表面溫度區(qū)間內(nèi)，換熱系數(shù)隨著噴水密度增加而增大；當(dāng)噴水密度相同時(shí)，隨著鑄錠表面溫度升高，換熱系數(shù)迅速降。
關(guān)鍵字: 連續(xù)鑄造； 鋁合金； 冷卻/凝固控制； 換熱系數(shù)
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
