CAJ | 학술논문

O元素是硅钢中的有害杂质，RH精炼脱氧方式对O含量的控制有重要影响。本文结合大生产的含铝无取向硅钢，研究了RH精炼脱氧方式对无取向硅钢连铸坯夹杂物的影响。结果表明，采用“先硅后铝”脱氧方式对应的脱氧速度低于“先铝后硅”脱氧方式。采用“先铝后硅”脱氧方式时钢液O含量迅速降低。合适的Si含量及纯循环时间有利于减少连铸坯中O含量的差异；对于“先硅后铝”脱氧方式，连铸坯的夹杂物以SiO2系夹杂物为主，占夹杂物总量的86.7%；对于“先铝后硅”脱氧方式，连铸坯的夹杂物以Al2O3系夹杂物为主，占夹杂物总量的84.6%；采用“先硅后铝”脱氧方式的脱氧效果优于“先铝后硅”脱氧方式，连铸坯的微细夹杂物比例小于“先铝后硅”脱氧方式，还有利于提高或改善成品带钢的电磁性能。
O원소시규강중적유해잡질，RH정련탈양방식대O함량적공제유중요영향。본문결합대생산적함려무취향규강，연구료RH정련탈양방식대무취향규강련주배협잡물적영향。결과표명，채용“선규후려”탈양방식대응적탈양속도저우“선려후규”탈양방식。채용“선려후규”탈양방식시강액O함량신속강저。합괄적Si함량급순순배시간유리우감소련주배중O함량적차이；대우“선규후려”탈양방식，련주배적협잡물이SiO2계협잡물위주，점협잡물총량적86.7%；대우“선려후규”탈양방식，련주배적협잡물이Al2O3계협잡물위주，점협잡물총량적84.6%；채용“선규후려”탈양방식적탈양효과우우“선려후규”탈양방식，련주배적미세협잡물비례소우“선려후규”탈양방식，환유리우제고혹개선성품대강적전자성능。
s: The oxygen element is harmful to Si steel, and the RH refining deoxidation method has an important effects on oxygen concentration. Based on the industrial non-oriented Si steel containing Al, the effects of RH refining deoxidation method on non-metallic inclusions were discussed. Results show that the deoxidation rate of the Si-Al deoxidation method is higher than that of the Al-Si deoxidation method. For the Al-Si deoxidation method, the oxygen concentration of liquid steel is sharply decreased. In order to decrease the variation of oxygen concentration for Si-Al and Al-Si deoxidation method, it is necessary to get an optimal Si content and degassing time. In addition, for Si-Al deoxidation method, the main non-metallic inclusion containing SiO2 accounts for the total of 86.7%. For Al-Si deoxidation method, the main non-metallic inclusion containing Al2O3 accounts for the total of 84.6%. Thus, the effects of Si-Al deoxidation method are better than that of the Al-Si deoxidation method, and the proportional of minus non-metallic inclusions in slab is also less than that of the Al-Si deoxidation method. This is beneficial to i mprove the magnetic properties of the finished Si steel sheets.