(西北工業(yè)大學(xué) 凝固技術(shù)國家重點(diǎn)實(shí)驗(yàn)室， 西安 710072)
摘 要: 基于傅立葉導(dǎo)熱微分方程， 建立了薄板坯連鑄過程中凝固傳熱的數(shù)學(xué)模型， 編制了預(yù)測連鑄過程中溫度場分布的計(jì)算機(jī)模擬程序。 利用該程序計(jì)算了不同拉速及冷卻條件下， 銅薄板連鑄過程中溫度場的分布， 并分析了拉速、 冷卻條件對(duì)鑄坯溫度的影響。 模擬結(jié)果表明： 拉速提高， 出坯溫度明顯升高， 因此為了防止拉漏， 關(guān)鍵是選擇合理的拉速； 同時(shí)， 冷卻條件也是影響結(jié)晶器溫度場分布的重要工藝參數(shù)之一； 模型計(jì)算得出的鑄坯溫度與實(shí)測值基本相符， 溫度誤差在10 ℃以下， 計(jì)算結(jié)果可優(yōu)化連鑄工藝參數(shù)。
關(guān)鍵字: 薄板； 連鑄； 溫度場； 拉速； 冷卻條件
（ State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China）
Abstract: A mathematical model to represent the solidification heat transfer process of thin-slab continuous casting and a computer simulation program based on Fourier conduction differential equation were worked out, which can be applied to predict the distribution of temperature field during the process of continuous casting. This program was applied to calculate the temperature distribution of copper thin-slab continuous casting with different casting speeds and cooling conditions. In the meantime, the effects of casting speed and cooling condition on thermal profile were studied. Simulation experiments show that the surface temperature out of the mould can be increased significantly by improving the casting speed. So in order to prevent the thin-slab from leaking, choosing casting speed correctly is a sticking point. Additionally, cooling condition is one of the important technological parameters as well as casting speed. The results show that the thermal profile calculated by mathe
matical model almost agrees with those obtained by experimental measurement, and the error is within 10 ℃.
Key words: thin-slab; continuous casting; temperature field; casting speed; cooling condition
