Electromagnetic stirring with alternating current during electroslag remelting

Mitchell, A.; Hernández-Morales, B.

doi:10.1007/bf02654251

Cited by 30 publications

(11 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the interface between the slag-pool and pool-ingot were assumed to be flat. In addition, the influence of the droplets was taken into account in the form of a momentum and energy source applied to slag and pool regions [4][5][6][7][8][9][10]. These simplifying assumption restrict the further application of the aforementioned models.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the formation and the dripping of droplet in the Electroslag Remelting process

Liu

Cai

et al. 2017

THERM SCI

View full text Add to dashboard Cite

Based on the magnetohydrodynamic module of the commercial computational fluid dynamics software FLUENT, a 3-D mathematical model was developed to describe the multi-field coupling phenomenon in the electroslag remelting process. The model predicted value is in good agreement with the experimental measurements. The simulation results show that, during the melt dripping process, the resistance of the electroslag remelting system is decreasing while the current density and velocity, as well as the temperature are increasing gradually. The maximum value of current density, electromagnetic force, and velocity appears when the melt droplet detaches and the quality of large droplets fall into the slag-metal interface. The maximum value of the current density is increased by almost one order of magnitude. The maximum value of the electromagnetic force and velocity increased by 2.5 and 4.7 times, respectively. The maximum value of Joule heating and temperature appears when the droplets fall into the slag-metal interface. The maximum value of the Joule heating and temperature increased for about 174.7% and 26.8%, respectively, when compared with the moment of the melt droplet formation.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the formation and the dripping of droplet in the Electroslag Remelting process

Liu

Cai

et al. 2017

THERM SCI

View full text Add to dashboard Cite

show abstract

“…So it is necessary to research the droplet evolution behavior at the end of the consumable electrode. In order to improve the contact area of metal/slag, the process named of Magnetic Field Control ESR (MFC-ESR) [8][9][10][11][12] A transparent experimental model had been built to visualize the electroslag remelting (ESR) process. With the help of the transparent model, the evolution of the droplet happening at the tip of the consumable electrode was recorded clearly by a high-speed camera with the record frequency of 200 frames per second.…”

Section: Introductionmentioning

confidence: 99%

Visualization Study on the Droplet Evolution Behaviors in Electroslag Remelting Process by Superimposing a Transverse Static Magnetic Field

Wang

Zhong

et al. 2016

ISIJ Int.

View full text Add to dashboard Cite

“…[8,36,37] Due to the falling of the metal droplet, the electric current as well as EMF changes significantly. It can be seen that the EMF around the metal droplet tends to block its motion.…”

Section: B Electromagnetic and Joule Heating Fieldsmentioning

confidence: 99%

A General Coupled Mathematical Model of Electromagnetic Phenomena, Two-Phase Flow, and Heat Transfer in Electroslag Remelting Process Including Conducting in the Mold

Wang

et al. 2014

Metall Mater Trans B

View full text Add to dashboard Cite

A transient three-dimensional finite-volume mathematical model has been developed to investigate the coupled physical fields in the electroslag remelting (ESR) process. Through equations solved by the electrical potential method, the electric current, electromagnetic force (EMF), and Joule heating fields are demonstrated. The mold is assumed to be conductive rather than insulated. The volume of fluid approach is implemented for the two-phase flow. Moreover, the EMF and Joule heating, which are the source terms of the momentum and energy sources, are recalculated at each iteration as a function of the phase distribution. The solidification is modeled by an enthalpy-porosity formulation, in which the mushy zone is treated as a porous medium with porosity equal to the liquid fraction. An innovative marking method of the metal pool profile is proposed in the experiment. The effect of the applied current on the ESR process is understood by the model. Good agreement is obtained between the experiment and calculation. The electric current flows to the mold lateral wall especially in the slag layer. A large amount of Joule heating around the metal droplet varies as it falls. The hottest region appears under the outer radius of the electrode tip, close to the slag/metal interface instead of the electrode tip. The metal pool becomes deeper with more power. The maximal temperature increases from 1951 K to 2015 K (1678°C to 1742°C), and the maximum metal pool depth increases from 34.0 to 59.5 mm with the applied current ranging from 1000 to 2000 A.

show abstract

Electromagnetic stirring with alternating current during electroslag remelting

Cited by 30 publications

References 13 publications

Numerical simulation of the formation and the dripping of droplet in the Electroslag Remelting process

Numerical simulation of the formation and the dripping of droplet in the Electroslag Remelting process

Visualization Study on the Droplet Evolution Behaviors in Electroslag Remelting Process by Superimposing a Transverse Static Magnetic Field

A General Coupled Mathematical Model of Electromagnetic Phenomena, Two-Phase Flow, and Heat Transfer in Electroslag Remelting Process Including Conducting in the Mold

Contact Info

Product

Resources

About