A Numerical Study on the Influence of the Frequency of the Applied AC Current on the Electroslag Remelting Process

Sibaki, Ebrahim Karimi; Kharicha, Abdellah; Wu, Menghuai; Ludwig, Andreas; Holzgruber, H.; Ofner, B.; Ramprecht, M.

doi:10.1007/978-3-319-48102-9_2

Cited by 20 publications

(11 citation statements)

References 7 publications

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“…After computing the electromagnetic field, distributions of Lorentz force and Joule heat can be obtained, which are source terms for momentum and energy equations, respectively. [105] The origin of the Lorentz force is the interaction between the electric current and the self-induced magnetic field in the system. Furthermore, the process by which the passage of an electric current through a conductor releases heat is known as Joule or resistive heating.…”

Section: Electromagnetic Fieldmentioning

confidence: 99%

“…Thus, a 2D axisymmetric model was found enough to describe the average electric current distribution in the ESR. [79] In the literature, two different approaches were suggested to calculate the electromagnetic field: the most widely used is the one based on magnetic induction formulation, [88,105] and other is based on vector potential-scalar potential formulation. [100,106,118,119]…”

Section: Electromagnetic Fieldmentioning

confidence: 99%

“…In fact, the macrosegregation in an ingot is strongly governed by the flow in the melt pool and mushy zone. [105] Wang et al [101] attempted to model macrosegregation of Ni in AISI 201 stainless steel for a laboratory scale ESR ingot (f 120 mm). As shown in Figure 8, they observed negative segregation at the lower part and positive segregation in the upper part of the ingot.…”

Section: Heat Transfer and Solidificationmentioning

confidence: 99%

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Review on Modeling and Simulation of Electroslag Remelting

Kharicha

Karimi-Sibaki

et al. 2017

steel research int.

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The Electroslag Remelting (ESR) is an advanced technology for the production of high quality materials, for example, hot work tool steels or nickel base alloys. In the past years, several models are developed aiming to predict the way in which the operational parameters affect the structure and chemical composition of the final ESR ingot. Proper modeling of this process depends on the ability of the model to predict the Multiphysics resulting from the complex coupling between many physical phenomena. This review includes the main findings starting from the 1970's, with a special focus on the results obtained in the period of 1999-2017. The difficulties related to the poorly known physical properties of ESR slags are discussed. Then, the main achievements in the field of electromagnetism, fluid flow, heat transfer, and solidification are also summarized. The review finishes by presenting the special topics representing the actual scientific frontiers, such as the physics of mold current, the importance of multiphase phenomena, and the difficulties in predicting the electrode melting rate.

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Section: Electromagnetic Fieldmentioning

confidence: 99%

Section: Electromagnetic Fieldmentioning

confidence: 99%

Section: Heat Transfer and Solidificationmentioning

confidence: 99%

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Review on Modeling and Simulation of Electroslag Remelting

Kharicha

Karimi-Sibaki

et al. 2017

steel research int.

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“…Meanwhile, a low frequency remelting current can increase the power factor, meaning that a large electric energy can be saved, especially for the large scale ESR process. 20,21) Some researches [22][23][24] had been done about the influences of the low frequency current on the ESR process, but few reports were released in regard to the droplet evolution behaviors under the MC-ERS process.…”

Section: Influences Of the Transverse Static Magnetic Field On The Drmentioning

confidence: 99%

Influences of the Transverse Static Magnetic Field on the Droplet Evolution Behaviors during the Low Frequency Electroslag Remelting Process

Huai

Zhong

et al. 2017

ISIJ Int.

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“…In the past, efforts have been made to study the coupled electromagnetic, flow and temperature fields, and freezing in the ESR process. [6][7][8][9] Weber et al simulated the remelting of a nickel-based alloy by a two-dimensional axisymmetric model. 10) The computed results matched well with experimental data.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effect of Slag Thickness on Metal Pool Profile in Electroslag Remelting Process

Wang

2016

ISIJ International

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A transient three-dimensional (3D) model was developed to understand the role slag thickness plays in the formation of the metal pool in the electroslag remelting (ESR) process. In this model, the solution of the mass, momentum and energy conservation equations were simultaneously implemented by the finite volume method with full coupling of the Joule heating and Lorentz force by solving the Maxwell's equations. The movement of metal droplet was described by volume of fluid (VOF) approach. Additionally, the solidification was modeled using an enthalpy-based technique, where the mushy zone was treated as a porous medium. The experiment and simulation demonstrated a reasonable agreement. The results indicate that changing the slag thickness changes the slag temperature, but not monotonically. The slag temperature drops with the slag thickness up to 60 mm, beyond which the slag temperature rises. The melt rate decreases and then increases while the cooling intensity remains unchanged. As a consequence, the maximal metal pool depth reduces from 0.081 m to 0.067 m and slightly increases to 0.074 m.

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A Numerical Study on the Influence of the Frequency of the Applied AC Current on the Electroslag Remelting Process

Cited by 20 publications

References 7 publications

Review on Modeling and Simulation of Electroslag Remelting

Review on Modeling and Simulation of Electroslag Remelting

Influences of the Transverse Static Magnetic Field on the Droplet Evolution Behaviors during the Low Frequency Electroslag Remelting Process

Numerical Investigation on the Effect of Slag Thickness on Metal Pool Profile in Electroslag Remelting Process

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