【摘要】 研究了低碱度、低氧化铝精炼渣对帘线钢夹杂物控制情况。试验采用LD→LF,F精炼→软吹Ar→连铸工艺生产帘线钢,在碱度1.0、Al₂O₃质量分数为5%左右的精炼渣成分控制条件下,钢中酸溶铝Al_S的质量分数控制在0.000 5%左右,进而控制夹杂物中Al₂O₃质量分数在22%以内,使得帘线钢中氧化物夹杂。MnO-Al₂O₃-SiO₂类、CaOAl₂O₃-SiO₂类复合夹杂物实现了良好的塑性化控制。根据分析,在帘线钢夹杂物去除方面,软吹氩处理对钢中CaOAl₂O₃-SiO₂系复合夹杂物去除效果比对MnO-Al₂O₃.SiO₂类夹杂物更加明显;在成分控制方面,钢液中Al_S含量随着炉渣碱度、炉渣Al₂O₃质量分数的升高而升高,而夹杂物中Al₂O₃质量分数会随着钢液中Al_S含量升高而升高。更多还原

【Abstract】 The inclusion control of tire cord steel based on refining slag of low basicity and low Al₂O₃ content was investigated.The technology process of LD-LF-Soft Blow Argon-CC was used to produce tire cord steel in experiment.And when the values of the basicity and the Al₂O₃ mass fraction of refining slag were controlled about 1.0%and 5%respectively,the mass percent of Al_s would be controlled about 0.000 5%,and then the average mass percent of Al₂O₃ in inclusion would be controlled less than 22%,which is beneficial to plastification of the MnO-Al₂O₃-SiO₂ and CaO-Al₂O₃-SiO₂ complex inclusions.According to the analysis,the removal efficiency of CaO-Al₂O₃-SiO₂ complex inclusion is more obviously than MnO-Al₂O₃-SiO₂ complex inclusion during the process of soft blow argon,and with the rising of mass percent of Al_s,which increases with the rising of basicity and mass percent of Al₂O₃ of slag,the mass percent of Al₂O₃ in inclusions increases.更多还原