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Effect of magnetic field on elements segregation in electroslag ingot
Journal of Iron and Steel Research International ( IF 2.5 ) Pub Date : 2021-04-09 , DOI: 10.1007/s42243-021-00600-7
Gang Gao , Chun-li Zhu , Xiao-fang Shi , Li-zhong Chang

In order to improve the production efficiency of electroslag remelting process and the solidification quality of electroslag ingot, a novel electroslag furnace with electromagnetic stirring was designed and the effects of external magnetic field and different electrical parameters on electroslag remelting process were studied. The distribution of carbon, chromium, phosphorus and compactness in electroslag ingot was analyzed through original position analysis apparatus. Results show that the external magnetic field accelerates the remelting of consumable electrode. Under the condition of remelting voltage of 34 V and current of 1500 A, the remelting rate of metal consumable electrode increases from 20 to 27 mm min−1 when the magnetic induction intensity of 62 × 10−4 and 108 × 10−4 T is applied. However, the remelting current decreases from 1500 to 1100 A under the condition of constant remelting rate and remelting voltage, thereby reducing the energy consumption. The effect of external magnetic field on the segregation of different elements in electroslag ingot is different. Under the experimental conditions, the carbon segregation is unremarkable, but the phosphorus segregation is improved when the electromagnetic force generated by the interaction between the external magnetic field and the remelting current is small. However, the excessive electromagnetic force aggravates the segregation of carbon and phosphorus. With the increase in electromagnetic force, the chromium segregation gradually increases.



中文翻译:

磁场对电渣铸锭中元素偏析的影响

为了提高电渣重熔工艺的生产效率和电渣锭的凝固质量,设计了一种新型的电磁搅拌电渣炉,研究了外部磁场和不同电参数对电渣重熔工艺的影响。通过原位分析仪分析了电渣锭中碳,铬,磷的分布和致密性。结果表明,外部磁场加速了可消耗电极的重熔。在重熔电压为34 V,电流为1500 A的条件下,当磁感应强度为62×10 -4和108×10时,金属自耗电极的重熔速率从20 mm min -1增加到27 mm min -1-4  T被施加。然而,在恒定的重熔速率和重熔电压的条件下,重熔电流从1500 A降低到1100 A,从而降低了能耗。外部磁场对电渣铸锭中不同元素偏析的影响是不同的。在实验条件下,碳的偏析不明显,但是当外部磁场和重熔电流之间的相互作用产生的电磁力较小时,磷的偏析得到改善。但是,过大的电磁力加剧了碳和磷的偏析。随着电磁力的增加,铬的偏析逐渐增加。

更新日期:2021-04-09
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