论文部分内容阅读
针对某厂240 mm×280 mm 45钢连铸矩形坯的内部质量缺陷,建立了基于射钉和测温验证的铸坯温度场实时跟踪计算模型,同时,根据目标表面温度对二冷水量进行优化,并应用了动态二冷配水系统。结果表明,动态配水考虑了传热过程的滞后性,在拉速波动时能更好地控制铸坯表面温度;铸坯质量得到明显改善,中心疏松、缩孔、中间裂纹和中心裂纹等缺陷都有不同程度的减轻,且基本消除1级以上的缺陷。
Aiming at the internal quality defects of 240 mm × 280 mm 45 continuous casting rectangular billets in a factory, a real-time tracking calculation model of temperature field of billets based on nailing and temperature measurement was established. At the same time, the secondary cooling water was optimized according to the target surface temperature , And the application of a dynamic cooling water distribution system. The results show that the dynamic water distribution considers the lag of the heat transfer process and can control the slab surface temperature better when the pulsation speed is fluctuated. The slab quality is obviously improved, the defects of center loosening, shrinkage cavity, middle crack and center crack are all Have different degrees of mitigation, and the basic elimination of more than one defect.