Abstract：The solidification microstructure plays an important role in controlling bloom quality during continuous casting. A numerical model was established to study the effect of CA model parameters and casting conditions on final solidification microstructure based on the production of heavy rail steel U71Mn. It can be concluded that the mean nucleation undercooling and maximum nucleation density affects the columnar crystal zone and crystal size, respectively. When the casting speed fluctuation is lower than 0.5m/min, the final solidification microstructure is less changed. Nevertheless, the casting temperature greatly affects the solidification microstructure. When the temperature increases from 15℃ to 45℃, the mean grain diameter increases from 1.555mm to 1.721mm, meanwhile the equiaxed grain ratio gradually decreases. Therefore, at the casting temperature meeting the requirement of normal production, the bloom quality will be improved as the casting temperature is properly decreased.
屈天鹏，王水根，冯科. 连铸工艺对方坯凝固组织影响的数值模拟[J]. 中国钢铁期刊网, 2013, 32(6): 7-11.
QU Tian-peng,WANG Shui-gen,FENG Ke. Numerical Simulation on Solidification Microstructure of Bloom During Continuously Casting Process. Chinese Journal of Iron and Steel, 2013, 32(6): 7-11.
2013, Vol. 32 
