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钢帘线生产难度大,帘线钢盘条对盘条有着严格的质量要求,帘线钢盘条的带状组织是由P元素偏析引起的。研究了高碳钢小方坯内二次枝晶间距与P偏析两者之间的关系,结果表明,P元素偏聚在二次枝晶间,二次枝晶间距较大位置处的P元素偏析率也相对较大,最大的二次枝晶间距位置和磷元素的最大偏析点均出现在柱状晶与等轴晶交界处,可以通过减小二次枝晶间距的措施,达到控制磷元素在铸坯内偏析的效果。降低拉速及在一定范围内增大二冷水比水量,能够有效地减小二次枝晶间距。
Steel cord production difficult, cord steel wire rod has strict quality requirements, cord steel wire strip organization is caused by P element segregation. The relationship between secondary dendrite spacing and P segregation in high carbon steel billet was studied. The results show that P element segregates between the secondary dendrite and the secondary dendrite, The segregation rate is also relatively large. The maximum secondary dendrite spacing and the maximum segregation point of the phosphorus element appear at the junction of the columnar and equiaxed grains. The reduction of secondary dendrite spacing can be achieved to control the content of phosphorus Segregation effect in the slab. Decrease the pulling speed and increase the specific water ratio of secondary cooling water within a certain range, which can effectively reduce the secondary dendrite spacing.