45钢连铸大方坯凝固过程数值模拟  

Numerical Simulation of Solidification Process for Continuous Casting Large Size Steel Square Billet Containing 0.45%C

作　　者：留津津[1] 刘建华[2] 吴华杰[2] 包燕平[2] 王国新[2] 杜建新[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京科技大学冶金工程研究院,北京100083

出　　处：《铸造技术》2011年第2期259-261,共3页Foundry Technology

摘　　要：根据240 mm×280 mm 45钢的实际生产条件,建立基于射钉和测温的方坯凝固传热数学模型。分析了拉速、过热度、二冷强度等参数对铸坯温度和凝固坯壳厚度的影响。结果表明,拉速是主要影响因素。拉速增大0.1 m/min,铸坯表面中间温度平均升高35℃左右,空冷区内中心温度明显增大,凝固终点后移2.25 m左右。According to practical production of 240 mm×280 mm 0.45C steel billet in a certain factory,a mathematical model of solidification and heat transfer of square billet based on pin-shooting and temperature measuring was established.The influences of casting speed,superheat and flow rate of secondary cooling on the continuous casting billet temperature and thickness of shell were analyzed.The results show that casting speed is the primary factor.With increasing casting speed by 0.1 m/min,surface temperature of billet raises by about 35 ℃ averagely,center temperature in radiation zone increases obviously,and the final stage of solidification shifts about 2.25 m backward.

关 键 词：45钢 连铸 大方坯 凝固 数值模拟 

分 类 号：TF777.2[冶金工程—钢铁冶金]