Impact of Fill Ratio on Temperature Profile and Metal Bath Configuration in Electroslag Remelting Process With Vibrating Electrode

2018 ◽  
Vol 90 (4) ◽  
pp. 1800092 ◽  
Author(s):  
Fang Wang ◽  
Yunlong Xiong ◽  
Baokuan Li
Keyword(s):  
Temperature Profile ◽  
Electroslag Remelting ◽  
Metal Bath ◽  
Fill Ratio

scholarly journals Investigation on the effect of electrode tip on formation of metal droplets and temperature profile in a vibrating electrode electroslag remelting process

Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 743-751 ◽  
Author(s):  
Fang Wang ◽  
Jakov Baleta ◽  
Qiang Wang ◽  
Baokuan Li
Keyword(s):  
Temperature Profile ◽  
Electroslag Remelting ◽  
Temperature Fields ◽  
Maximum Temperature ◽  
Periodic Pattern ◽  
Coupled Modelling ◽  
Frequency Changes ◽  
Volume Method ◽  
Peak Value ◽  
Metal Droplets

Abstract In the present work, a transient full-coupled modelling approach has been put forward to study the effect of electrode tip on formation of metal droplets and temperature profile in the electromagnetically-controlled electroslag-remelting furnace with vibrating electrode. The electromagnetic field, momentum and energy conservation equations are solved simultaneously based on the finite volume method. The interface of slag and metal is traced using the volume of fluid approach. The results show that in the case of cone tip electrode the average dimension of metal droplets is smaller compared to the flat tip electrode. In addition, the bigger and stretched metal droplets are not observed with the cone tip electrode. The temperature fields with the cone tip electrode are distributed in a prominent periodic pattern compared to the case with flat tip electrode. The maximum temperature zone with the cone tip electrode is located along the z axial in the upper part of slag, not in the lower part. When the frequency changes from 0.17 Hz to 1 Hz, the maximum temperature reduces from 2050 K to 1985 K and the peak value of velocity decreases from 0.20 m/s to 0.125 m/s. When the vibration amplitude varies from 3mm to 6mm, the maximum temperature in the slag cover drops by 3.9% and the peak value of velocity rises by 16.7%.

scholarly journals INFLUENCE OF CONSUMABLE ELECTRODE ROTATION ON ANISOTROPY OF PROPERTIES OF THE BILLET OBTAINED BY ELECTROSLAG REMELTING

2019 ◽  
Vol 62 (2) ◽  
pp. 91-96
Author(s):  
I. V. Chumanov ◽  
M. A. Matveeva ◽  
D. V. Sergeev
Keyword(s):  
Dendritic Cell ◽  
Physical And Mechanical Properties ◽  
Electroslag Remelting ◽  
Consumable Electrode ◽  
Metal Bath ◽  
Main Research ◽  
Theoretical Substantiation ◽  
Outer Perimeter ◽  
Hydrodynamic Environment ◽  
Electrode Metal

The article presents theoretical substantiation of the influence of electroslag remelting technology with rotation of consumable electrode on physicomechanical properties of the formed casting (billet). The technology of electroslag remelting with rotation of consumable electrode around its own axis leads to formation of upward flow of heat in the slag bath, making hydrodynamic environment in mold more rational from the point of using generated heat. During rotation of consumable electrode, centrifugal forces act on liquid metal film formed at the end of the electrode, providing radial flow of molten metal droplets. Subsequent separation occurs from the outer perimeter of electrode. Thus, drops of electrode metal fall into the metal bath closer to the wall of the mold, aligning temperature front of the bath. Decrease in temperature gradient of bath over the cross section leads to a flatter crystallization front. Studied technology of electroslag remelting with rotation of consumable electrode should have an impact on physical and mechanical properties of resulting casting (billet). In order to establish effect of rotation of consumable electrode during electroslag remelting on properties of metal obtained, experimental remelting was carried out. The article presents data on experimental electroslag remelting of electrodes of 20Kh13 grade steel using various technologies at A-550 unit. In course of experiment, influence of rotation technology of consumable electrode on conditions of remelting process, billet crystallization, changes in mechanical and physical properties was established. The influence of remelting method on complex properties of resulting billet was analyzed. As the main research tool, processing of the obtained data on microhardness, density, dendritic cell size of experimental samples was used. Analysis of the research results of billets in transverse direction showed an increase in microhardness uniformity in implementation of electroslag remelting technology with rotation of consumable electrode along the course of smelting. It is also shown that use of the rotation technology reduces size of dendritic cell of billet and increases density of the ingot formed in comparison with traditional technology without rotating electrode.

scholarly journals Modeling the behavior of direct current electromagnetic forces acting on a drop of liquid metal during electroslag remelting

2021 ◽  
Vol 64 (7) ◽  
pp. 530-535
Author(s):  
I. V. Chumanov ◽  
I. A. Alekseev ◽  
D. V. Sergeev
Keyword(s):  
Magnetic Field ◽  
Liquid Metal ◽  
Electric Field ◽  
Direct Current ◽  
Electroslag Remelting ◽  
Metal Bath ◽  
Ansys Fluent ◽  
Metal Drop ◽  
Liquid Metal Bath ◽  
Electrode Metal

The article presents mathematical and computer modeling of the behavior of liquid electrode metal drops during the process of electroslag remelting (ESP) at a constant current source. The study of the effect of electric field created by direct current allowed us to show the deviation of the drop trajectory from the electrode axis. The flow of electrons and drops of the electrode metal are exposed to electromagnetic forces, which leads to their displacement relative to the remelted electrode axis. This effect entails destabilization of the liquid metal bath and crystal heterogeneity. In turn, the use of external influence on the flow of ESR process can make it possible to stabilize the liquid metal bath even with the use of direct current. Centrifugal forces can act as such forces. They can arise when implementing the technology with the consumable electrode rotation around its own axis. To establish the optimal parameters of rotation speed, it is necessary to estimate the magnitude of impact of the magnetic field that occurs during direct current remelting process. The modeling was carried out using the Ansys Fluent 16.0 software package on the example of remelting 12Kh18N10T steel under the flux ANF-6. The algorithm for calculating of Ansys Fluent is based on the finite element method. In this paper, the mathematical apparatus was not changed and was used in its initial form. The method of magnetic induction was used. The database of information about the ongoing process was built on a grid of finite elements with certain, but sufficient level of adequacy and quality. Each element contains information about the model at a given point, specified for this modeling process. We have revealed the change in the trajectory of the electrode metal drop by electric field from the opposite direction along which the drop flows. The average length of the path traversed by liquid metal drop from the mold axis to the inner surface is from 5 to 15 cm. The motion of an electrode metal drop without an external magnetic field was simulated. This simulation made it possible to determine (estimate) the direction of movement of electrode metal drops and the indicator of necessary external force to stabilize the liquid metal bath during ESP process at direct current equal to 0.067 N.

Control Algorithms for Inductors Movement in Induction Heated Calenders

2012 ◽  
Vol 17 (4) ◽  
pp. 51-57
Author(s):  
Andrzej Frązyk ◽  
Piotr Urbanek ◽  
Jacek Kucharski
Keyword(s):  
Temperature Profile ◽  
Induction Heating ◽  
Control Algorithms ◽  
Uniform Temperature ◽  
Cylinder Axis ◽  
Steel Cylinder ◽  
Modern Technologies ◽  
Temperature Amplitude

Abstract Fixed, placed at regular distances inductors for induction heating of a rotating steel cylinder do not provide sufficiently uniform temperature profile along cylinder axis required by modern technologies,. The article examines the influence of inductors movement along the cylinder axis on the reduction of pick-to- pick temperature amplitude.

CERROBASE Alloy

Alloy Digest ◽  
1979 ◽  
Vol 28 (4) ◽  
Keyword(s):  
Liquid Metal ◽  
Eutectic Alloy ◽  
Slow Growth ◽  
Heat Treating ◽  
Metal Bath ◽  
Drop Hammer ◽  
Industrial Material ◽  
Liquid Metal Bath ◽  
Metal Products ◽  
Bismuth Lead

Abstract CERROBASE Alloy is a bismuth-lead eutectic alloy that melts at 255 F (124 C). It is characterized by initial shrinkage followed by slow growth. Its low melting temperature and/or growth-shrinkage characteristics make it a useful industrial material. Among many applications, it is used for (1) anchoring inserts in wood, metal or plastics, (2) drop-hammer dies, (3) duplicate patterns in pottery and foundry, and (4) liquid metal bath for heat treating. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on casting, forming, heat treating, and machining. Filing Code: Bi-11. Producer or source: Cerro Metal Products.

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