摘要
针对某钢厂180 mm×180 mm断面的方坯连铸机的主要参数,建立了二维非稳态凝固传热模型.模型充分考虑了铸坯的凝固潜热和材料热物性参数随温度变化的情况,应用有限差分法求解并用C#语言编制相关程序.模型充分地细化了结晶器中实际边界条件,在结晶器内部考虑了铸坯各部位气隙的不均匀性,并比较分析了结晶器中气隙的存在对铸坯角部温度的影响.分析了拉速、过热度以及冷却强度对铸坯表面温度、液相穴深度以及出结晶器坯壳厚度的影响.
Based on main technical parameters of a new built 180 mm x 180 mill billet caster in steel work, a mathematical model for heat transfer and solidification of two-dimensional non-steady state casting bloom considering the solidified hidden heat and the material thermo-properties relating to temperature was established. The finite differenee method and the C# programming language were applied to solve the mathematical model which considered the actual boundary condition and the air gap in different part of the billet in the mold. The influence of the air gap on the billet corner tenlperature was studied and analyzed. The influence of casting speed,superhearing degree and intensity of cooling on the temperature of casting bloom, the depth of liquid hole and the thickness of the solidified shell were analyzed.
出处
《内蒙古科技大学学报》
CAS
2012年第3期262-267,共6页
Journal of Inner Mongolia University of Science and Technology
基金
中央高校基本科研业务费专项基金资助项目(FRF-BR-09-020B)
关键词
方坯
连铸
凝固传热
模型
气隙
工艺参数
billet
continuous casting
solidification and heat transfer
model
air-gap
technological parameters
