钢包顶渣改性对无取向电工钢夹杂物和磁性能的影响  

Effects of Ladle Top Slag Modification Treatment on Inclusion and Electromagnetic Properties of Non-oriented Electrical Steels

作　　者：吴德润[1] 唐洪乐[2] 李玉华[1] 王勇[2] 

机构地区：[1]上海梅山钢铁股份有限公司制造部,南京210039 [2]上海梅山钢铁股份有限公司炼钢厂,南京210039

出　　处：《电工材料》2016年第1期3-6,10,共5页Electrical Engineering Materials

基　　金：宝钢科技项目(K14MGBA490)

摘　　要：为了获得适宜的钢包顶渣化学成分,确保在低成本冶炼的前提下,获得良好的炼钢生产稳定性和成品带钢电磁性能,结合工业化生产的B50A1300牌号无取向电工钢,开展了转炉钢包顶渣改性技术研究。结果表明:钢包顶渣改性之后,在低成本冶炼的条件下,通过提高渣、钢之间Ti元素的分配比,使得钢中的杂质元素Ti含量可以稳定控制在5×10-4%(质量分数,下同)以下;钢包顶渣吸收夹杂物的能力大幅提高,夹杂物的数量平均从561.38个/mm2降至212.61个/mm2,尺寸平均从1.13μm增至1.63μm;消除应力退火前后,成品带钢的铁损P15/50分别降低0.24 W/kg、0.19 W/kg,磁感B50分别增加0.005 T、0.007 T。In order to obtain appropriate top slag chemical composition system, stable steelmaking manufacture and excellent electromagnetic properties of the finished steel sheets under lower steel- making cost, the process for ladle top slag modification is studied based on the industrial manufac- ture of B50A1300 grade non-oriented electrical steel. The results show that after the ladle top slag modification treatment, the Ti concentration of steel can be controlled below 5×10^-4% with lower steelmaking cost by improving the distribution ratio of Ti between the top slag and the liquid steel. Meanwhile, the non-metallic inclusion can be absorbed well by the ladle top slag, and the number of the non-metallic inclusions is decreased from 561.38 /mm^2 to 212.61/mm^2, and the size of them is increased from 1.13μm to 1.63μm. The iron loss P15/50 of the finished steel sheets before and after the stress relieving annealing is decreased by 0.24 W/kg and 0.19 W/kg, and the magnetic induction is increased by 0.005 T and 0.007 T respectively.

关 键 词：无取向电工钢 钢包顶渣改性 Ti元素 夹杂物 电磁性能 

分 类 号：TM275[一般工业技术—材料科学与工程] TG142.77[电气工程—电工理论与新技术]