上方侧注式双辊铸轧辊套温度场的数值模拟  

Numerical Simulation of Temperature Field in Cast-Roll Sleeve in Top Side-Pouring Twin Roll Casting

作　　者：徐国进[1] 周成[1] 王德[1] 李立彦[1] 

机构地区：[1]北京科技大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2014年第4期371-375,共5页Special Casting & Nonferrous Alloys

摘　　要：通过数值模拟,对上方侧注式双辊铸轧机的轧辊辊套温度场进行了研究。研究表明,通过将模拟结果与实测数据的比较,验证了模型的可靠性;在铸轧过程中,轧辊外表面温度随着轧辊的旋转发生周期性的变化;当上、下辊套厚度均为40mm时,上、下辊套的温度分布差异较大,下辊套温度明显比上辊套温度高;加强冷却对辊套温度场的影响较小;减小辊套厚度,辊套的温度降低,但辊套内、外表面温差增大;增加熔池与上辊套的接触弧长度,上辊套温度增大。Cast-rollers are very important in the twin-roll casting process,which is used to realize the so- lidification and rolling process of the molten metal. Meanwhile, the heat transfer process and the tem- perature distribution of roll sleeves are important factors influencing thermal crowning of the rolls as well as the shape and profile of cast strip. The temperature field of roll sleeves in the top side-pouring twin roll caster was simulated by the Fluent software during the twin-roll strip casting. The results show that the simulated results are well agreement with the measured data. The temperature of outer surface of the caster roll exhibits a periodic change with the rotation of the caster roll in the twin-roll strip casting. When the thickness of both the upper sleeves and the lower sleeves are 40 mm, the tem- perature distribution of the upper roll sleeve is very different from that of the lower roll, and the temper- ature of the lower roll sleeve is significantly higher than the upper roll sleeve. Effects of strengthening internal water cooling on the temperature field of the roll sleeve can be ignored. Through reducing the thickness of roll sleeve, the temperature of the roll sleeve is decreased, however, the temperature differ- ence between the outer surface and inner surface of the roll sleeve is increased. Through increasing the contact arc of the molten pool and the upper roll, the temperature of the upper roll sleeve is raised.

关 键 词：上方侧注式双辊铸轧 辊套 数值模拟 温度场 

分 类 号：TG115.25[金属学及工艺—物理冶金] TG333.17[金属学及工艺—金属学]