Morphology Control of Metal Pool and Eutectic Carbides in Electroslag Remelted M2 HSS with an External Axial Static Magnetic Field

This study investigates the influence of a superimposed axial static magnetic field (ASMF) on the morphology of metal pool and eutectic carbides (ECs) in electroslag remelted M2 high-speed steel (HSS). The application of ASMF caused the metal pool to become shallower, and the solidified structure to...

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Bibliographic Details
Published in:Metals (Basel ) 2023-05, Vol.13 (5), p.912
Main Authors: Zhao, Xuhui, Sun, Zhonghao, Xia, Zhibin, Liu, Chunmei, Shen, Zhe, Ding, Biao, Zheng, Tianxiang, Guo, Yifeng, Li, Qiang, Zhong, Yunbo
Format: Article
Language:English
Subjects:
Alloys
Aluminum oxide
ASMF
Carbides
Continuous casting
Cooling
Crystallography
ECs
Electrodes
ESR
High speed tool steels
Inclusions
Investigations
Lorentz force
M2 HSS
Magnetic fields
metal pool
Morphology
Slag
Solidification
Steel pipes
Temperature distribution
Titanium
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Summary:This study investigates the influence of a superimposed axial static magnetic field (ASMF) on the morphology of metal pool and eutectic carbides (ECs) in electroslag remelted M2 high-speed steel (HSS). The application of ASMF caused the metal pool to become shallower, and the solidified structure to expand axially, along with finer (i.e., more uniformly distributed and crystallographically oriented) ECs. Lorentz force-driven unidirectional circulation in slag pool was the primary cause of the metal pool’s morphological adjustment; this resulted in a more homogenous temperature distribution in slag pool. Thus, the heat transfer from the slag pool to the metal pool became more uniform, creating a metal pool that is shallower. Additionally, local solidification time (LST) became shorter, while the number of (Ti, V)N-Al2O3 inclusions serving as heterogeneous nuclei for EC formation increased due to ASMF, enabling finer EC with more crystallographic orientations in ESR ingots.
ISSN:2075-4701
2075-4701
DOI:10.3390/met13050912