(燕山大學 國家冷軋板帶裝備及工藝工程技術研究中心，秦皇島 066004)
摘 要: 雙輥薄帶鑄軋過程中工藝參數(shù)對中心層偏析有重大影響，針對雙輥薄帶鑄軋機的特點，利用多相流技術建立完全耦合溶質場、流場、溫度場的數(shù)學模型，對鑄軋熔池中液相-液固兩相-固相同時存在的復雜凝固過程進行模擬仿真，研究分析鑄軋熔池中Mg、Si元素溶質場與流場分布特征，對比研究不同工藝參數(shù)(澆鑄溫度、輥縫寬度)對鑄軋薄帶中心層偏析的影響規(guī)律，并結合鋁合金6061的鑄軋實驗對結論進行驗證。
關鍵字: 雙輥薄帶鑄軋；中心線偏析；流場；Kiss點高度
（National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China）
Abstract:The technical parameters of twin-roll strip casting have significant impact on the centerline segregation. The mathematical model in completely coupled temperature field, flow field and solute field was established by using multiphase flow technology for the characteristics of twin-roll strip casting mill. The solidification process of simultaneous existence of liquid phase, liquid-solid-phase and solid phase in molten pool was simulated based on the coupled mathematical model. The distribution characteristics of Mg and Si solute field and flow field in the molten pool were studied by the simulation results, and the influence of different technical parameters (the width of the roll seam and casting temperature) on the centerline segregation of the thin strip was studied. The research conclusion was verified by the casting and rolling experiments of the aluminum alloy 6061.
Key words: twin-roll strip casting; centerline segregation; flow field; Kiss point height
