摘要
采用基于体积平均的有限控制体法,对Fe-C二元合金薄板坯连铸凝固过程进行了紊流流动、凝固及溶质传输的三维耦合数值模拟。计算结果表明,钢液的紊流流动显著改变了薄板坯内温度场形状及溶质浓度的分布。浸入式水口产生的射流对铸坯宽面的冲刷造成了凝固坯壳厚度沿宽面的不均匀分布。同时分析了宏观偏析的形成及可能形成的位置。
Based on the control-volume method, a 3-D coupled model has been developed for binary iron-carbon alloy to describe the turbulent fluid flow, heat transfer, solidification, and solute redistribution in the thin slab in continuous casting. Calculated results show that the turbulent fluid flow intensively alters the shapes of temperature field and the solute distribution in thin slab. The impact of flow jet from immersed nozzle on broad face of the thin slab is responsible for un-even distribution of solidified shell thickness along broad face. The formation mechanism and potential position of macro-segregation are analyzed.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2006年第3期150-153,共4页
Special Casting & Nonferrous Alloys
基金
国家863计划资助项目(G2001AA339030)
关键词
薄板坯连铸
紊流
凝固
宏观偏析
耦合模拟
Continuous Casting Thin Slab, Turbulent Fluid Flow, Solidification, Macro-segregation, Couple Model
