基于Q235B钢铸坯的动态轻压应用研究  

Application Research of Dynamic Soft Reduction Based on Q235B Steel Slab

作　　者：龙艳彬[1] 陈雪波[1] 

机构地区：[1]辽宁科技大学电信学院,辽宁鞍山114051

出　　处：《铸造技术》2017年第12期2915-2919,共5页Foundry Technology

摘　　要：为提高Q235B内部质量,建立铸坯凝固传热模型和动态轻压下模型,利用MSC.Marc有限元软件进行单元网格划分并进行离散求解。结果表明,在拉速由1.4 m/min依次升到1.6 m/min时,出铸机口的热收缩值依次减小0.12 mm和0.14 mm;压下区间随拉速增大而增大但总压下量变化不大;同一固相率fs下,压下效率随着压下量的增加而增加。经钢厂实践,动态轻压下参数优化后铸坯的顶锻合格率达到99.41%、低倍合格率为99.75%,有效改善了铸坯的质量。In order to improve the internal quality of Q235 B steel,the solidification heat transfer and dynamic soft reduction model were established,using the MSC Marc finite element software, the unit meshes and discrete solutions were carried out.The results show that the heat shrinkage of the casting nozzle reduce from 0.12 mm to 0.14 mm in turn, when the pull speed raise from 1.4 m/min to 1.6 m/min.The reduction zone increases with the increase of the casting speed, but the total reduction amount varies little.With the same fs, the reduction efficiency increases with the increase of the reduction amount.Through the practice of steel plant,the qualified rate of the top forging of slab is 98.41%, the qualified rate is 98.75% after optimization of dynamic soft reduction, which effectively improves the quality of the cast slab.

关 键 词：凝固传热 动态轻压 压下区间 压下量 压下效率 

分 类 号：TF777[冶金工程—钢铁冶金]