连续铸造复合轧辊辊芯预热的数值模拟  

Numerical Simulation of Preheating Core of Composite Roll for Continuous Casting

作　　者：冯明杰[1] 王恩刚[1] 王俊刚[1] 赫冀成[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2007年第10期1401-1405,共5页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2003AA331050)

摘　　要：建立了连续铸造复合轧辊辊芯预热的数学模型,并对辊芯预热温度的分布情况进行了数值模拟,分析了拉坯速度及陶瓷隔热管对辊芯预热温度分布的影响.结果表明,辊芯到达线圈下端面时,辊芯表面与中心具有最大的断面温差,离开线圈一定距离后,由于表面的散热作用,中心温度会超过表面温度;较大的拉坯速度不利于提高辊芯的预热质量;在拉坯速度较小的情况下,安装陶瓷隔热管将会对辊芯表面起到较好的保温作用,而在拉坯速度较大时,保温效果不明显.Some mathematical models were developed for preheating the core of composite roll for continuous casting, then the effects of the casting speed and ceramic heat-insulation tube on the distribution of preheating temperature were investigated by numerical simulation. The results indicated that the maximum temperature difference between roll core＇s surface and center appears when the core is drawn up to equivalent to the bottom of coil, and the center temperature is higher than surface＇s when it goes off to distance from the position because of the heat radiation of core＇s surface. The high casting speed is disadvantageous to roll core reheating. The ceramic heat-insulation tube will benefit the heat preservation of core＇s surface when the casting speed is low but it is not so obvious at high casting speed.

关 键 词：复合轧辊 辊芯预热 温度分布 数值模拟 

分 类 号：TF777.7[冶金工程—钢铁冶金]