试验分析了凝固末端电磁搅拌（F-EMS）在不同工艺参数条件下对180mm×220mm轴承钢连铸坯中心等轴晶比率,碳、磷及硫偏析,以及对连铸坯中心疏松及残余缩孔的影响,试验结果表明,当凝固末端电磁搅拌参数设置在（12Hz/350A）时,连铸坯中心等轴晶比率的平均值由未经末端电磁搅拌的42%提高至69%;当凝固末端电磁搅拌参数设置为10Hz/300A时,连铸坯的中心疏松、缩孔及中心偏析级别分别由未使用末端电磁搅拌的3.0级、1.5级和1.5级降至1.0级、0级和0级,碳、硫、磷质量分数极值分别由未使用末端电磁搅拌0.042%、0.003%、0.002%降至0.016%、0.001%、0.001%。
The effect of fag end electromagnetic (F-EMS) on center equiaxial crystal zone proportion, carbon, phos- phorus, and sulphur segregation, porosity and sink of con-casting billet (180 mm×220 mm) in different technology parameters has been tested and analyzed. The results showed that the average center equiaxial crystal zone propor- tion in con-casting billet with F-EMS inereasedfrom 42% to 69% in the billet without F-EMS when the F-EMS parameter was set on 12Hz/350A. The grade of center porosity, sink and center segregation was decreased to 1.0, 0 and 0 from 3.0, 1.5 and 1.5 without F-EMS, the extreme content of carbon, phosphorus and sulphur was decreased to 0. 016%, 0. 001% and 0. 001% from 0. 042%, 0. 003% and 0. 002% without F-EMS when the F EMS parameter was set on 10 Hz/300A.
参考文献
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