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内置式结晶器电磁搅拌对60钢小方坯夹杂物的影响
Effect of Interior Mould Electromagnetic Stirring
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- DOI:
- 作者:
- 钟凌鹏1，张桂芳1，施哲1，蒋泰旭2
- 作者单位:
- 1.昆明理工大学材料与冶金工程学院，云南 昆明 650093；2.武钢集团昆明钢铁股份有限公司，云南 昆明 650302
- 关键词:
- 内置式结晶器；电磁搅拌；夹杂物；60钢小方坯
Interior mould； Electromagnetic stirring; Inclusions; 60 steel billet
- 摘要:
- 为了60钢小方坯中夹杂物，采用电磁搅拌电流为0、150 A、250 A，频率为3 Hz工艺参数，进行非金属夹杂物出现频率对比和夹杂物的能谱分析比较。结果表明，采用内置式结晶器电磁搅拌后，60钢夹杂物得到了控制。随着搅拌强度增加，60钢中的夹杂物≥1.0级的基本消除，夹杂物≥0.5级的由原来的33.33%下降到8.47%。在浇注过程中随钢流带入的非金属夹杂物，如脱氧产物、耐火材料的冲刷、水口结瘤的冲刷等，经电磁搅拌后大部分可以被排出，证明电磁搅拌消失夹杂物效果明显。
The effect of difference electromagnetic stirring intensity on inclusions of 60 steel billet was analyzed. Stirring technical parameters, with the current of 0 A, 150 A and 250 A, and the frequency of 3 Hz, were adopted in the experiment. And the occurrence frequency of nonmetallic inclusions and the energy spectrum of the inclusion were investigated. The results showed that the inclusions of 60 steel billet can be improved by interior MEMS, and, with increasing the current intensity of MEMS, the inclusions of 60 steel billet was reduced. The grade of the nonmetallic inclusions, larger or equal to 1.0, was removed, and the grade of the nonmetallic inclusions ≥0.5 decreased from 33.33% to 8.47%. The nonmetallic inclusions brought into molten steel, i.e., deoxidization product, the inclusions washed by the refractories,the inclusions brought by the wash of nozzle clogging, could be almost removed by MEMS.