Evolutions of Electromagnetic Fields and Forced Flow Driven by the Pulse Length of a Pulsed Magnetic Field and Their Relevance to the Grain Refinement of a Solidified Al–Si Hypoeutectic Alloy

Zhang, Yunhu; Wang, Junjie; Zhang, Jianlei; Xu, Yanyi; Ye, Chunyang; StJohn, D. H.; Song, Changjiang; Zheng, Hongxing; Wang, Gui

doi:10.1007/s11663-023-02900-7

Cited by 2 publications

(1 citation statement)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Through the simulation of the electromagnetic field and Lorentz force during different PMO treatments, Edry et al [ 29 ] found that changes in electric current intensity have a more pronounced effect on grain size variation compared to changes in PMO pulse frequency. Zhang et al [ 30 ] found that the flow intensity is proportional to both electric current intensity and frequency, whereas it increases first and then decreases with increasing pulse length. However, the coupling calculation of electromagnetic field, flow field, and temperature field in continuous casting with PMO treatment has not been solved yet.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Process Parameters for 40Cr Steel Continuous Casting Round Bloom with Pulsed Magneto‐Oscillation Treatment

Yang,

Chen,

Zhang

et al. 2024

steel research int.

View full text Add to dashboard Cite

To reduce the solidification structure defects and the macrosegregation of the Φ300 mm continuous casting round bloom, the pulsed magneto‐oscillation (PMO) treatment is added at the secondary cooling zone. A numerical model for calculating the pulsed electromagnetic field, flow field, and temperature field in continuous casting is established, and the coupling simulations of multiphysical fields under different casting parameters and PMO parameters are performed. Their influence on solidification process and the appropriate parameters are discussed. The industrial experiments conducted under the recommended parameters yield good results. Industrial experiments show that when the peak current is increased from 1350 to 1550 KIA and the casting speed is increased from 0.75 to 0.90 m min−1, PMO can increase the equiaxed grain zone and reduce the carbon macrosegregation of the bloom. Moreover, at high casting speed, PMO treatment can significantly promote columnar‐to‐equiaxed transition and increase the width of mixed grain zone.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimization of Process Parameters for 40Cr Steel Continuous Casting Round Bloom with Pulsed Magneto‐Oscillation Treatment

Yang,

Chen,

Zhang

et al. 2024

steel research int.

View full text Add to dashboard Cite

show abstract

Evolution of Electromagnetic Fields and Forced Flow in a Metal Melt under the Impact of Hot‐Top Pulsed Magneto‐Oscillation

Zhou,

Chen,

Zhang

et al. 2024

steel research int.

Self Cite

View full text Add to dashboard Cite

Hot‐top pulsed magneto‐oscillation (HPMO) is developed as a novel approach to achieve grain refinement and solute homogenization in heavy steel ingots. Through a combination of numerical simulations and melt flow measurements, this study investigates the evolution of electromagnetic fields and forced flow within alloy melts under the influence of HPMO, with a focus on varying electromagnetic parameters such as electric current intensity, frequency, and pulse length. The results of the simulations reveal the formation of double‐circulating flows in opposite directions within the melt. Experimental measurements of the flow field distribution closely align with the simulation outcomes. Furthermore, it is observed that the induced magnetic field inside the melt changes direction once, and the electromagnetic force changes direction three times within a single pulse length period under the influence of HPMO. Notably, the radial electromagnetic force, directed toward the interior of the melt, surpasses the normal electromagnetic force away from the melt. This phenomenon leads to a stable flow of the melt, contributing to grain refinement. The findings presented in this study offer valuable insights into the use of HPMO as a promising technique for improving the quality of heavy steel ingots.

show abstract

Evolutions of Electromagnetic Fields and Forced Flow Driven by the Pulse Length of a Pulsed Magnetic Field and Their Relevance to the Grain Refinement of a Solidified Al–Si Hypoeutectic Alloy

Cited by 2 publications

References 74 publications

Optimization of Process Parameters for 40Cr Steel Continuous Casting Round Bloom with Pulsed Magneto‐Oscillation Treatment

Optimization of Process Parameters for 40Cr Steel Continuous Casting Round Bloom with Pulsed Magneto‐Oscillation Treatment

Evolution of Electromagnetic Fields and Forced Flow in a Metal Melt under the Impact of Hot‐Top Pulsed Magneto‐Oscillation

Contact Info

Product

Resources

About