帘线钢中氧化物夹杂塑性化控制技术研究

Study on plasticization control of oxide inclusions in tire cord steel

为将帘线钢中氧化物夹杂转变为低熔点塑性夹杂物,在实验室开展了夹杂物组成、钢液成分和顶渣组成之间的关系研究,基于研究结果提出了工业生产中实现钢中夹杂物塑性化控制的技术方案,并进行了精炼工艺技术对钢中夹杂物塑性化影响的工业试验,夹杂物成分位于低熔点液相区,实现了夹杂物塑性化控制。制丝过程将Ф1.25 mm的粗丝拉为Ф0.2 mm帘线,2 000 m试验拉拔的全部生产过程未出现断丝,且盘条中夹杂物数量也降低到3个/mm2。工业生产中制丝过程的断丝率为0.47次/t。

In order to transform oxide inclusions in tire cord steel to plastic inclusions with low melting point, the compositions of inclusions, molten steel and top slag were studied in laboratory. On this basis, technical program of industrial test was proposed, and the industrial tests were carried out. With these studies, the components of inclu- sions can be controlled in low melting point area, and the oxide inclusions are trans- formed to plastic inclusions with low melting point. The results show that, the wires are not broken for 2 000 m when the diameter transforms from 1.25 mm to 0. 2 mm, and the ratio of broken wire is only 0. 47 times for per ton wire in industrial production. Otherwise, there are only 3 inclusions in wires per square millimeter.