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真空自耗電弧熔煉中電磁攪拌的數(shù)值模擬
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國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃“973”項(xiàng)目(2007CB613802)


Numerical Simulation of Electromagnetic Stirring during Vacuum Arc Remelting
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    摘要:

    利用ANSYS軟件對(duì)真空自耗電弧熔煉的電磁攪拌過(guò)程進(jìn)行三維模擬計(jì)算，分析重熔電流、磁場(chǎng)和洛倫茲力的分布情況，討論了攪拌線(xiàn)圈對(duì)磁場(chǎng)和攪拌力的影響。結(jié)果表明:重熔電流從坩堝壁經(jīng)熔池表面流回電極，鑄錠和坩堝底部幾乎沒(méi)有電流；重熔電流產(chǎn)生環(huán)繞對(duì)稱(chēng)軸的磁場(chǎng)，磁場(chǎng)強(qiáng)度從電極中心到坩堝外壁呈先增大后減小的趨勢(shì)；攪拌線(xiàn)圈產(chǎn)生平行于對(duì)稱(chēng)軸的磁場(chǎng)，其磁感應(yīng)強(qiáng)度在鑄錠部分呈均勻分布；施加攪拌線(xiàn)圈產(chǎn)生了使熔池發(fā)生旋轉(zhuǎn)的洛倫茲力

    Abstract:

    In the present paper, 3-D numerical simulations of electromagnetic stirring during vacuum arc remelting (VAR) were conducted by using the ANSYS software to study the distribution of remelting current, magnetic field and Lorentz force. The effects of coil on magnetic and Lorensz force were also discussed. The results show that the current flows during VAR from crucible wall to the electrode via the surface of the ingot melt pool，and the currents in the crucible base and the ingot base are almost zero. The magnetic field inducted by remelting current is axisymmetric and rounding, and the magnetic flux density along radial direction increases to a maximum value near the edge of the electrode and then decreases. The magnetic field in ingot inducted by coil is parallel to the symmetry axis and the magnetic flux density is nearly uniform. The Lorentz force of coil could circumrotate the ingot melt pool

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王斌斌,常 輝,李金山,王錦程,寇宏超,胡 銳,周 廉.真空自耗電弧熔煉中電磁攪拌的數(shù)值模擬[J].稀有金屬材料與工程,2009,38(11):1969~1973.[Wang Binbin, Chang Hui, Li Jinshan, Wang Jincheng, Kou Hongchao, Hu Rui, Zhou Lian. Numerical Simulation of Electromagnetic Stirring during Vacuum Arc Remelting[J]. Rare Metal Materials and Engineering,2009,38(11):1969~1973.]
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  • 收稿日期:2008-10-27
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