摘要
为了检测结晶器的热流分布,在复式结晶器非金属材料段不同位置埋设热电偶,测定了结晶器的温度场,并在此基础上建立了描述复式结晶器内方坯凝固过程的三维数学模型。应用CFX商业软件计算了结晶器内钢液的流场和温度场,并从理论上分析了复式结晶器内钢液凝固过程对铸坯凝固组织的影响。计算和实验结果表明:采用复式结晶器后,结晶器非金属材料段钢液的平均温度梯度约为0 9℃/mm,铸坯的面等轴晶率约为80%。
The temperature field of the nonmetallic material of combined mold was measured using thermocouples at different place of mold to get the heat flux distribution in mold. A three dimensional mathematical model depicting the solidification of the liquid steel in mold was built. The flow field and temperature field were computed by a commercial software named CFX. Besides, the effect of solidification for liquid steel in combined mold on the solidification microstructure of billet was analysed theoreticalloy.The computed result and experimental result indicate that the average temperature gradient of liquid steel at nonmetallic material section in combined mold is 0.9 ℃/mm, and the equiaxial crystal rate of billet is 80 %.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2004年第3期9-14,共6页
Journal of Iron and Steel Research
基金
新一代钢铁材料重大基础研究资助项目(99240140A)
关键词
复式结晶器
数学模型
凝固
热流
combined mold
mathematical model
solidification
heat flux
