Study on the metallurgical function of mold electromagnetic stirring in continuous casting bloom

夹带(生物音乐学) 熔渣(焊接) 冶金 材料科学 强度(物理) 连铸 布鲁姆 喷射(流体) 电流(流体) 体积流量 模具 复合材料 机械 热力学 光学 物理 节奏 声学
作者
Yadong Wang,Wei Chen,Lifeng Zhang
出处
期刊:Metallurgical Research & Technology [EDP Sciences]
卷期号:120 (5): 505-505
标识
DOI:10.1051/metal/2023061
摘要

The metallurgical function of mold electromagnetic stirring(M-EMS) was investigated by simulation according to the following factors: flow field, temperature field, solidification, removal of inclusions, slag entrainment, and macrosegregation. When the current intensity increased from 0 A to 490 A, the rotational flow induced by M-EMS enhanced gradually, and the impinging effect of jet flow on the solidification front decreased obviously. The average speed on the top surface increased from 0.015 m/s to 0.038 m/s. The temperature of the molten steel was more uniform, and the temperature on the top surface decreased from 1788.5 K to 1785.9 K. The depth of depressions induced by the jet flow decreased from 6.1 mm to 0.7 mm. When the current intensity of M-EMS was 390 A, the removal fraction of inclusions was the highest. When the current intensity of M-EMS was 0 A, no slag entrainment occurred. With the current intensity of M-EMS increasing from 290 A to 490 A, the net slag entrainment rate was 0.003, 0.013, and 0.047 kg/s. When the current intensity of M-EMS increased from 0 A to 490 A, the minimum carbon content of negative segregation in the subsurface of the bloom worsened from 0.176% to 0.167%. For the bloom CC process, the M-EMS scheme should be weak or no M-EMS to decrease the occurrence of slag entrainment and improve the negative segregation in the subsurface of the bloom.

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