连铸坯枝晶臂间距检测方法的优化与应用实践

介绍了连铸坯凝固组织中树枝晶臂间距检测方法的优化试验及其应用效果。通过对连铸坯凝固冷却过程的分析及批量数据的采集,确定了测定连铸坯树枝晶臂间距的代表性区域,建立了一种科学测量枝晶臂间距的方法。将该方法应用于连铸圆坯生产检验中,能快速准确地找出铸坯枝晶臂间距随连铸二冷强度变化的规律,采取调整连铸二冷强度的措施,来控制一、二次枝晶臂间距大小,达到了减轻或消除铸坯开裂缺陷、提高连铸质量的目的。

Optimization and practical application of measurement method for dendrite arm spacing of continuous casting slab

The present paper introduces tests on the optimization of the measurement method for dendrite arm spacing in the continuous casting slab and its application.By analysis on the solidification cooling process and data acquisition of the CC slab the typical region of dendrite arm spacing is determined and a scientific method for measurement on the dendrite arm spacing is established.By application of this method in the CC slab production the law of change of dendrite arm spacing of CC slab with the variation of secondary cooling intensity can be quickly and accurately determined.By adjustment of the intensity of the secondary cooling of continuous casting the size of the primary and secondary dendrite arm spacings can be controlled and thus the purpose of alleviation and removal of the slab cracking defect and improvement in the quality of the slab is achieved.