scholarly journals Effect Of Technological Parameters On Sizes Of Molten Metal Pool In Plasma-arc Surfacing Of Copper Plates Of Mccb Moulds

2015 ◽  
Vol 2015 (1) ◽  
pp. 21-25 ◽  
Author(s):  
V.G. Kozhemyakin ◽  
◽  
V.A. Shapovalov ◽  
V.R. Burnashev ◽  
D.V. Botvinko ◽  
...  
Keyword(s):  
Molten Metal ◽  
Metal Pool ◽  
Plasma Arc ◽  
Technological Parameters ◽  
Molten Metal Pool

Minimization of Thermal Stresses in Continuously-Cast Ingot with Restriction on its Molten-Metal Pool Volume

1999 ◽  
Vol 30 (4-6) ◽  
pp. 296-302
Author(s):  
F. V. Nedopekin ◽  
Victor K. Tolstykh ◽  
N. A. Volodin ◽  
V. V. Belousov ◽  
S. V. Gridin
Keyword(s):  
Molten Metal ◽  
Thermal Stresses ◽  
Metal Pool ◽  
Cast Ingot ◽  
Continuously Cast ◽  
Molten Metal Pool

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.

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.

scholarly journals Experimental research and numerical simulation of moving molten metal pool

2015 ◽  
Vol 1 (0) ◽  
pp. 15-00367-15-00367 ◽  
Author(s):  
Penghui CHAI ◽  
Nejdet ERKAN ◽  
Masahiro KONDO ◽  
Koji OKAMOTO ◽  
Hongyang WEI
Keyword(s):  
Numerical Simulation ◽  
Molten Metal ◽  
Experimental Research ◽  
Metal Pool ◽  
Molten Metal Pool

Study on Plasma Arc Surface Hardening of Alloy Cast Iron

2012 ◽  
Vol 184-185 ◽  
pp. 1240-1243
Author(s):  
Ya Hui Wang ◽  
Bao Chen Ren ◽  
Ji Hong Yang
Keyword(s):  
Cast Iron ◽  
Surface Hardening ◽  
Technological Parameter ◽  
Orthogonal Test ◽  
Plasma Arc ◽  
Technological Parameters ◽  
Structure Condition ◽  
Surface Quenching ◽  
Alloy Cast Iron ◽  
Alloy Cast

Plasma arc was used as a heat source to make a surface quenching on alloy cast iron, and orthogonal test was used to optimize the surface hardening technological parameter of plasma arc. The influence of the technological parameters on hardness and depth of the hardening layer was analyzed, and the microhardness and the microscopic structure condition after being disposed were also analyzed and discussed.

3D Simulation of Stress-Strain State of Plasma Arc Surfacing by CAD/CAE Software Sysweld

2014 ◽  
Vol 1029 ◽  
pp. 1-7
Author(s):  
Rayna Dimitrova ◽  
Alexander Nedelchev ◽  
Antonio Nikolov
Keyword(s):  
Deformation Process ◽  
Strain State ◽  
3D Simulation ◽  
Visual Environment ◽  
Plasma Arc ◽  
Technological Parameters ◽  
State Distribution ◽  
Stress Strain ◽  
Stress Strain State ◽  
Cae Simulation

The deformation process during the plasma arc surfacing is analyzed by CAD/CAE software SysWeld under Visual Environment using 3D simulation. The aim of simulation is visualization of a temperature field and a stress-strain state distribution as resul ts of surfacing under typical technological parameters of plasma arc processing which could be used for education. Key w ords : CAD/CAE simulation , plasma arc surfacing , stress-strain state

Research of the Technological Parameters Importance for Plasma Arc Thermal Cutting

2011 ◽  
Vol 110-116 ◽  
pp. 3742-3749 ◽  
Author(s):  
Michal Hatala ◽  
Jozef Zajac ◽  
Róbert Čep ◽  
Imrich Orlovský
Keyword(s):  
Technological Factor ◽  
Adjustment Process ◽  
Quality Level ◽  
Feed Speed ◽  
Plasma Arc ◽  
Technological Parameters ◽  
Plasma Burner ◽  
Thermal Cutting ◽  
Process Factors ◽  
Pressure Nozzle

Many clients and plasma arc thermal cutting devices providers deal with the question which technological factor in adjustment process of cutting has the greatest influence on the final product quality. Many researchers and teachers deal with this issue during lecturing these knowledges for university students. The article presents the design and evaluation of plasma arc cutting technological process. Influence of technological factors on roughness parameters Ra of the steel surface ISO Fe510 have been evaluated using planned experiments. Using factor experiment, the significance of the four process factors: plasma burner feed speed, plasma gas pressure, nozzle diameter, distance between nozzle mouth and material have been observed. Regression models obtained by multiple linear regression indicates the quality level as observed factors function.

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.

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