1 State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200444, China 2 Materials Genome Institute, Shanghai University, Shanghai 200444, China
Influence of pulsed magneto-oscillation on microstructure and mechanical property of rectangular 65Mn steel ingot
1 State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai 200444, China 2 Materials Genome Institute, Shanghai University, Shanghai 200444, China
摘要 The pulsed magneto-oscillation (PMO) technique has the potential to be applied in the production of heavy steel ingot. In order to confirm it and achieve more insights, the solidification of rectangular 65Mn steel ingot with the size of 220 mm 9 220 mm 9 1000 mm was investigated under the impact of PMO. Experimental results present that PMO treatment can remarkably refine the solidified microstructure of 65Mn steel ingot in comparison with the reference ingot without PMO. The application of PMO not only significantly reduces the grain size, but also promotes the morphology transition of equiaxed grains from well-developed dendritic structures to globular structures. And the resulted globular morphology is mainly due to the fact that the PMO-induced forced flow enhances the stability of crystal growth. As a consequence, the average tensile strength of as-cast samples is enhanced from 643.4 to 762.9 MPa under the application of PMO.
Abstract：The pulsed magneto-oscillation (PMO) technique has the potential to be applied in the production of heavy steel ingot. In order to confirm it and achieve more insights, the solidification of rectangular 65Mn steel ingot with the size of 220 mm 9 220 mm 9 1000 mm was investigated under the impact of PMO. Experimental results present that PMO treatment can remarkably refine the solidified microstructure of 65Mn steel ingot in comparison with the reference ingot without PMO. The application of PMO not only significantly reduces the grain size, but also promotes the morphology transition of equiaxed grains from well-developed dendritic structures to globular structures. And the resulted globular morphology is mainly due to the fact that the PMO-induced forced flow enhances the stability of crystal growth. As a consequence, the average tensile strength of as-cast samples is enhanced from 643.4 to 762.9 MPa under the application of PMO.
XUN Jie,CHENG Cheng,DINGPU, et al. Influence of pulsed magneto-oscillation on microstructure and mechanical property of rectangular 65Mn steel ingot[J]. Journal of Iron and Steel Research International, 2018, 25(8): 862-866.
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