连铸坯凝固末端永磁搅拌与电磁搅拌对比研究  

Comparison between permanent magnet stirring and final electromagnetic stirring during continuous casting bloom

作　　者：曾杰[1] 张森林 曹长法 王广顺 陈伟庆[1] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]岳阳通海炉窑电磁设备有限公司,湖南岳阳414000 [3]青岛钢铁集团有限公司技术中心,山东青岛266043

出　　处：《炼钢》2016年第2期36-40,共5页Steelmaking

摘　　要：为进一步改善高碳钢82A内部质量,在矩形坯180mm×240mm连铸机上进行了凝固末端永磁搅拌和电磁搅拌对比工业试验。试验结果表明:永磁搅拌改善高碳钢内部质量效果优于电磁搅拌;永磁搅拌铸坯中心平均碳偏析指数为1.06,而电磁搅拌铸坯中心平均碳偏析指数为1.10;与电磁搅拌相比,永磁搅拌铸坯中心碳偏析指数小于1.05比例增加了40%,中心疏松0.5级比例增加了50%,缩孔0级比例增加了20%。此外,计算表明,永磁搅拌钢水的搅拌速度是电磁搅拌的1.15倍。As the demand for high-carbon 82A steel increase the improvement of internal quality such as center carbon segregation in rectangular bloom with the section size of 180 mm × 240 mm, both final permanent magnetic stirring and final electromagnetic stirring （F-EMS） were applied in a rectangular bloom caster. The results showed that the permanent magnet stirring provides an essential improvement in the internal quality of high-carbon rectangular blooms compared with the F-EMS. The mean center segregation degree of carbon was 1.06 with the permanent magnet stirring and 1.10 with the F-EMS. Compared with the F-EMS, the center segregation degree of carbon less than 1.05 was increased by 40 %, the grade of center porosity equals to 0.5 was increased by 50 % and the grade of shrinkage cavity equals to 0 was increased by 20 % by adopting the permanent magnet stirring. Besides, the calculating results showed that the stirring velocity of the molten steel with permanent magnet stirring was 1.15 times that of F-EMS.

关 键 词：末端永磁搅拌 末端电磁搅拌 高碳钢矩形坯 中心碳偏析 搅拌速度 

分 类 号：TF777.2[冶金工程—钢铁冶金]