摘要
建立了板坯连铸过程中,垂直拉坯方向传热的二维切片跟踪铸坯凝固数学模型.利用有限元软件ANSYS对板坯连铸凝固过程进行了瞬态热分析,并进行了射钉实验验证.对不同的过热度,不同的拉速(1.0和1.1 m/min)条件下,切片各点随时间变化的温度分布,以及铸坯壳厚度进行计算,并确定凝固末端位置.结果表明:随着过热度、拉速的增加,凝固末端位置距离结晶器液面变远;在合理的范围之内,拉速增加,铸坯表面温度增加,有助于防止铸坯表面裂纹的产生及提高板坯的生产效率.
A mathematical model was established to track the heat transfer on solidification of the slab continuous casting via 2- D slice vertical to casting direction. Finite element software ANSYS was used to conduct transient thermoanalysis for the solidification process of the slab continuous casting. Thermoanalysis data were verified by the nail shooting method. Temperature distribution of different node in slice was calculated at various superheat degree and casting speed（ 1. 0 and 1. 1 m /min）. The thickness of shell and terminal position of solidification were determined.The results showed,terminal position of solidification is farther from liquid surface with enhancement of superheat and casting speed. In a rational range,it is beneficial to avoid surface crack and improve production efficiency for us to increase casting speed and surface temperature.
出处
《材料与冶金学报》
CAS
北大核心
2015年第1期10-13,共4页
Journal of Materials and Metallurgy
基金
国家博士后面上资助项目(2013M53096)
关键词
连铸
数学模型
坯壳厚度
凝固末端
continuous casting
mathematical model
shell thickness
terminal of solidification
