连铸坯凝固末端永磁搅拌与电磁搅拌对比研究

炼钢

连铸坯凝固末端永磁搅拌与电磁搅拌对比研究

(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)

接受日期:1900-01-01 出版日期:2016-04-05

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

Accepted:1900-01-01 Online:2016-04-05

摘要/Abstract

摘要： 为进一步改善高碳钢82A内部质量，在矩形坯180 mm×240 mm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。

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

Abstract: 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.

Key words: final permanent magnet stirring, final electromagnetic stirring, high carbon rectangular bloom, center carbon segregation, stirring velocity

曾杰1，张森林2，曹长法3，王广顺3，陈伟庆1. 连铸坯凝固末端永磁搅拌与电磁搅拌对比研究[J]. 炼钢.

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