大圆坯连铸轻压下有限元分析

Finite element analysis of soft reduction for round bloom continuous casting

基于某钢厂的铸机条件,建立了大圆坯连铸轻压下的有限元模型,得到了不同压下量下铸坯变形规律。结果表明：（1）Ф800 mm在固相率0.35时,单辊压下量需大于10 mm,压下效果才能传递至铸坯芯部。（2）根据连铸机的设计标准,当铸坯表面应变值超过0.015时,铸坯表面极容易产生裂纹,即单辊的最大压下量不应超过8 mm。所以常规方式生产的圆坯不适合于实施轻压下工艺。通过调整工艺手段或者增加设备使圆坯便于轻压下,需在后续工作中进行研究。

Based on the round bloom continuous caster, the finite element model of soft reduction was established, it found that the change for transformation of bloom on the various reduction amount. The results show that： 1 ） the reduc- tion can be passed to the bloom core when solid fraction is above 0.35 and reduction amount of the single roll has to be greater than 10ram. 2）According to the design standard of the continuous caster, when the surface strain value of the slab exceeds 0.015, the surface of the slab is incline to appear cracks, so the maximum reduction of single roll should not exceed 8mm. Therefore, round bloom that be produced in a conventional manner is not suitable for the implementa- tion of the soft reduction process. By adjusting the technological means or adding equipment to facilitate the soft reduc- tion of round billets, it is necessary to study in subsequent work.