拉速对H型坯连铸结晶器内钢液传递特性的影响*
阮飞，詹梦璐，张红强，王鹏飞，纪义卿
（内蒙古科技大学材料与冶金学院，内蒙古包头014010）
关键词：H型坯连铸；结晶器；拉速；传递特性
中图分类号：TF777 文献标识码：A
摘要：以H型坯连铸结晶器为研究对象，采用FLUENT软件建立三维几何模型，模拟研究了拉速对结晶器内钢液传递特性的影响，结果表明，不同拉速条件下H型坯结晶器内钢液流态相似，但流场的主要特征参数有所不同。随着拉速的增大，结晶器内钢液射流冲击深度增大，结晶器自由液面流速增大，结晶器液面波动有增大趋势，钢水对凝固坯壳的冲刷有增大趋势。而各粒径夹杂物上浮去除率随拉速的增大而降低，该模拟条件下，20-100μm夹杂物去除率在4-17%之间。
The influence of casting speed on moltensteel transfer characteristic in mould for H-beam blank continuous casting
RUAN Fei,ZHAN Meng-lu, ZHANG Hong-qiang, WANG Peng-fei, JIYi-qing
(Materials andMetallurgy School , Inner Mongolia University of Science and Technology, Baotou014010,Inner Mongolia, China)
Key words：H-beam blank continuous casting；mould；casting speed；transfer characteristic
Abstract：With H-beam blank continuous casting mould as theresearch objects, the FLUENT software was adopted to build three dimensionalgeometry models to simulate the influence of casting speed on molten steeltransfer characteristics in the moulds. The results showed that, under differentcasting speed,the flow patterns of molten steel in the mould were verysimilar, while the main characteristic parameters were somewhat different. Withthe increase of the casting speed,not only the jet impacting depth of the molten steel increased in themould, the velocity of molten steel on the free surface also increased; thefree surface fluctuation had a tendency to increase in the mould, with thescouring effect of molten steel flow on the initial solidified shell having thesimilar trend, but the removal ratios of inclusions of different particle sizesdecreased. Under this simulation condition, the removal ratios of inclusionswith particle sizes between 20 μm and 100 μm were about 4%-17% in the mould.