炼钢 ›› 2020, Vol. 36 ›› Issue (4): 6-11.

• 炉外精炼 • 上一篇    下一篇

帘线钢脱氧过程中非金属夹杂物生成热力学

杨  文1,牛凯军1,季  莎1,杨  谱1,张洪起2,郭子强2   

  1. (1.北京科技大学 冶金与生态工程学院,北京 100083;
    2.河钢集团 钢研总院,河北 石家庄 050023)

  • 出版日期:2020-08-05 发布日期:2020-08-04

Thermodynamics of the formation of non-metallic inclusions in the deoxidation process of tire cord steels

  • Online:2020-08-05 Published:2020-08-04

摘要: 帘线钢要求良好的拉拔性能,而影响其拉拔性能的主要因素之一是钢中非金属夹杂物。钢中非金属夹杂物的主要来源为钢液的脱氧反应,为了更好地控制帘线钢中非金属夹杂物,必须对其脱氧热力学有深刻认识。然而,目前教科书中纯铁液脱氧热力学不能指导工业生产实践,且当前实际钢液的脱氧热力学没有系统化,需要进行深入研究。对帘线钢成分条件下的脱氧热力学进行了计算,并与纯铁液条件下的脱氧平衡曲线进行了对比分析,发现帘线钢成分条件和纯铁液条件下的脱氧平衡曲线差异明显。由于帘线钢实际生产过程中不可避免地存在多种合金元素,相比于纯铁液条件,帘线钢成分条件下的脱氧平衡曲线能够更加准确地指导帘线钢实际生产过程中的脱氧和非金属夹杂物的控制。


关键词: 帘线钢, 纯铁液, 脱氧, 非金属夹杂物, 热力学

Abstract: Tire cord steel requires good drawing performance,and one of the main factors affecting its drawing performance is non-metallic inclusions in steel.The main source of non-metallic inclusions in steel is deoxidation reaction of molten steel.In order to control non-metallic inclusions in tire cord steel better,the deoxidation thermodynamics should be understood deeply.However,the already published deoxidation thermodynamics of pure iron cannot guide the industrial production practice,and the deoxidation thermodynamics of the molten steel of actual steel grades has not been systematized at present,which needs further study.In the current work,the deoxidation thermodynamics of tire cord steel was calculated and compared with that in pure iron.It was found that there are obvious differences between the deoxidization equilibrium curves under the composition of tire cord steel and that in pure iron.Since there are several alloy elements inevitably exist in the actual production process of tire cord steel,the deoxidization equilibrium curve under the composition of tire cord steel can more accurately guide the control of deoxidization and nonmetallic inclusions in the actual production process of tire cord steel than that under the condition of pure iron.


Key words: tire cord steel, pure iron, deoxidation, non-metallic inclusion, thermodynamic