Quantitative Analysis of Molten Metal Flow in Rotating Stirring Electromagnetic Field

Abstract:

Electromagnetic stirring is an effective technique of improving the solidification structure and mechanical properties during continuous casting，because there is a notably effect of the flow on the density,segregation and inclusion of molten metal. In order to better understand the molten metal flow, the analysis software-ANSYS is used to simulate the 3D couple field of electromagnetic field and flow field for the self-developed rotating electromagnetic stirring equipment. The pure aluminum,tin and lead are used for both of experiment and simulation. The following results are obtained: 1) The magnetic induction intensity of liquid metal surface (B0) is in inversely proportional to the current frequency and is proportional to the input volt/current. 2) The maximum electromagnetic force is directly proportional to the square of magnetic induction intensity (B0) and the nth-power of current frequency decreases with the increase of the electric resistance of molten metal and changes from 1/2 to 3/2. The n is 1/2 for aluminum metal and 1 for tin metal and lead metal. 3) The rotating velocity of molten metal is directly proportional to the magnetic induction intensity(B0) and is in inversely proportional to the square root of the density of molten metal. The viscosity of molten metal has little effect on the rotating velocity. The above results are consistent with experiment results, which prove the credibility of simulate results.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 858-862
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.858
• Online since: June 2012
• Authors: Li Gao, Rong Rong Wang
• Keywords: ANSYS, Electromagnetic Field (EMF), Electromagnetic Stirring, Flow Field

References

[1] MA Guo-jun, MAO Hong-xiang, CHEN Chong-feng. Effect of Electromagnetic Stirring in Continuous Casting Mold on Inclusion[J]. Yunnan Metallurgy, 2004, 29(2): 50-53.

[2] W.D. Griffiths, D.G. Mccartney. The Effect of Electromagnetic Stirring on Macrostructure and Macrosegregation in the Aluminum Alloy 7150[J]. Materials Science and Engineering, 1997, 222(A):140-148.

DOI: 10.1016/s0921-5093(96)10527-x

[3] Charles Vives. Crystallization of Aluminum Alloys in the Presence of Vertical Electromagnetic Force Fields[J]. Journal of Crystal Growth, 1997,173: 541-549.

DOI: 10.1016/s0022-0248(96)01051-2

[4] ZHU Ming-yuan, XU Luo-ping, SHAO Guang-jie. Microstructure and mechanical properties of semi-solid ZL101A alloy prepared by EMS-DC method[J]. The Chinese Journal of Nonferrous Metals, 2000,10(suppl.1):150-154.

[5] QI Ya-li, JIA Guang-lin, ZHAO Yu-hua. Effect of electromagnetic stirring on solidification structure of casting[J]. Journal of shenyang Institute of Aeronautical Engineering, 2004,21(2):17-18

[6] WANG Xue-dong, ZHANG Wei-qiang, SHI Hai-fang. Numerical Simulation of Rotating Magnetic Field EMS[J]. Journal of Liaoning Technical University (Natural Science), 2000, 19(5): 543-545.

[7] HUANG Jun-tao, HE Ji-cheng. Numerical Simulation of Second Cooling Segment Electromagnetic Stirring in Billet Continuous Casting[J]. Journal of Iron and Steel Research, 2001, 13(5): 19-23.

[8] JIN Jun-ze, REN Zhong-ming, GUO Ke-ren, The Influence of Melt Flowage on the Distruibution and Compostion of Solute of Solidifed Aluminum Alloy[J]. Journal of Dalian Institute of Technology, 1985, 24(4): 108-113.

[9] FENG Ci-zhang. Electromagnetic Field[M]. Beijing: People Education Publishing Company, 1985. 279

[10] LING Dong. Study of separated eutectic phenomenon under the electromagnetic stirring[D]. Dalian: Dalian university of technology, 1996.16.