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

2016 ◽  
Vol 56 (2) ◽  
pp. 282-287 ◽  
Author(s):  
Qiang Wang ◽  
Baokuan Li
Keyword(s):  
Numerical Investigation ◽  
Electroslag Remelting ◽  
Metal Pool ◽  
Pool Profile ◽  
Slag Thickness

Numerical Simulation on the Microstructure of Small Electroslag Remelting Ingot

2011 ◽  
Vol 117-119 ◽  
pp. 1740-1743
Author(s):  
Jun Ping Yao ◽  
Zhong Sun
Keyword(s):  
Heat Transfer ◽  
Radial Direction ◽  
Casting Process ◽  
Electroslag Remelting ◽  
Metal Pool ◽  
Technological Parameters ◽  
Pool Profile ◽  
Columnar Grain ◽  
Grain Size And Orientation

The technological parameters determine the metal pool profile and the grain size and orientation in the electroslag remelting process, and thus affect the quality of the final ingot. The microstructure in the small electroslag casting process was simulated by CA method by means of the software MATLAB. Along with the remelting process, the columnar grain begins to grow to certain angle with axles, the shape of the metal pool gets closer to paraboloid shape. Improving the slag pool temperature or increasing the coefficient of heat transfer at the bottom or decreasing the coefficient of heat transfer at the side can lead the axial trend of grain growing to increase and the depth of the pool to shallow, otherwise can lead the trend of grain growing to radial direction to increase and the depth of the pool to deep.

scholarly journals A Comprehensive Mathematical Model of Electroslag Remelting with Two Series-Connected Electrodes Based on Sequential Coupling Simulation Method

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 658
Author(s):  
Wenjie Tong ◽  
Wanming Li ◽  
Ximin Zang ◽  
Huabing Li ◽  
Zhouhua Jiang ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Molten Metal ◽  
Skin Effect ◽  
Simulation Method ◽  
Melting Rate ◽  
Joule Heat ◽  
Electroslag Remelting ◽  
Metal Pool ◽  
Sequential Coupling ◽  
Molten Metal Pool

A comprehensive mathematical model of electroslag remelting with two series-connected electrodes (TSCE-ESR) was constructed based on sequential coupling method. The influence of droplet effect on electroslag remelting process (ESR) was considered in this model. Compared with one-electrode electroslag remelting (OE-ESR), the multi-physics field, droplet formation and dripping behavior, and molten metal pool structure of TSCE-ESR process were studied. The results show that during the process of TSCE-ESR, the proximity effect of the electrodes suppresses the skin effect, and Joule heat is concentrated in the area between the two electrodes of slag pool, making the temperature distribution of the slag pool more uniform. The heat used to melt the electrode in the process of TSCE-ESR accounts for about 34% of the total Joule heat, which is lower than the OE-ESR (17%). Therefore, it makes a higher melting rate and a smaller droplet size in the process of TSCE-ESR. Compared with OE-ESR, TSCE-ESR process can realize the unification of higher melting rate and shallow flat molten metal pool. Compared with the results without droplet effect, it is found that in the simulation results with droplet effect, the depth and the cylindrical section of molten metal pool increased, and the width of the mushy zone is significantly reduced, which is more consistent with the actual electroslag remelting process.

Effect of Slag Thickness on Macrosegregation and Transition Zone Width of Electroslag Remelting Dual Alloy Ingot

JOM ◽  
2015 ◽  
Vol 68 (1) ◽  
pp. 397-400 ◽  
Author(s):  
Qiang Wang ◽  
Hongguang Yan ◽  
Neng Ren ◽  
Baokuan Li
Keyword(s):  
Transition Zone ◽  
Electroslag Remelting ◽  
Zone Width ◽  
Alloy Ingot ◽  
Slag Thickness

Numerical Simulation of Electroslag Remelting Process for Producing GH4169 under Different Current Frequency

2012 ◽  
Vol 482-484 ◽  
pp. 1556-1565 ◽  
Author(s):  
Qiang Liang ◽  
Xi Chun Chen ◽  
Hao Ren ◽  
Cheng Bin Shi ◽  
Han Jie Guo
Keyword(s):  
Molten Metal ◽  
Simulation Software ◽  
Electroslag Remelting ◽  
Metal Pool ◽  
Current Frequency ◽  
Volumetric Heating ◽  
Physical Fields ◽  
Physical Phenomena ◽  
Insight Into ◽  
Molten Metal Pool

A comprehensive analysis of the physical processes that occur in Electroslag Remelting (ESR) process under steady state conditions and axisymmetric was performed using the simulation software MeltFlow. The detailed plots of current distribution, volumetric heating, flow, temperature and turbulent mixing provide insight into the various physical phenomena that occur in ESR process. The effect of current frequency on various physical fields was analyzed. It is shown that, the current in the slag tends to become more uniform due to the low electrical conductivity of the slag; after the current enters the ingot, the skin effect increases with the increase of the current frequency; the Joule heating and the Lorentz force are highest near the tip of the electrode in the slag, and increase with the increase of the current frequency; the velocities in the slag are slightly higher than those in the molten metal pool; with the increase of the current frequency, the liquidus temperature moves down, and the molten metal pool is deepened. Simulation results agree well with experimental results. Therefore, the generation and extent of defects could be predicted in different process.

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