Application of PMO-EMS combined control to improve the homogenization of casting billet

LI Hui-cheng; YANG Pu; LIU Hai-ning; XU Zhi-shuai; DOU Nai-yuan; LI Li-juan

doi:10.13228/j.boyuan.issn1005-4006.20220073

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Continuous Casting ›› 2022, Vol. 41 ›› Issue (4) : 66-71. DOI: 10.13228/j.boyuan.issn1005-4006.20220073

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Application of PMO-EMS combined control to improve the homogenization of casting billet

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Abstract

Pulsed magneto-oscillation(PMO) is an original homogenizing technology to refine the solidification structure and improve the homogenization of billets by promoting nucleation and forming grain rain. The production and application practice show that this technology has a significant effect on improving equiaxed grain ratio and reducing macrosegregation index of billets. In this study, an optimal combination of PMO and EMS was used to promote nucleation and form the “grain rain” effect and the stirring effect of EMS. The “grain rain” formed by PMO was dispersed evenly in the center of the billet, eliminating the eccentricity of equiaxed grain zone, thus greatly improving and stabilizingthe symmetry of solidification structureand homogenization effect of a billet and its stability. The results show that the application of PMO-EMS combined processcan significantly improve the homogenization of billets, and the central carbon of bearing steel GCr15 and gear steel 20CrMnTi can be controlled within 1.04 and 1.05, respectively.

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PMO / EMS / combined control / homogenization / segregation

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LI Hui-cheng, YANG Pu, LIU Hai-ning, et al. Application of PMO-EMS combined control to improve the homogenization of casting billet[J]. Continuous Casting, 2022, 41(4): 66-71 https://doi.org/10.13228/j.boyuan.issn1005-4006.20220073

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