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電磁連鑄高頻調(diào)幅磁場(chǎng)對(duì)鑄坯表面溫度的影響
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江蘇省高校自然科學(xué)研究計(jì)劃(05KJD450043); 江蘇省高技術(shù)研究(BG2005026); 江蘇省自然科學(xué)基金 (BK2006078)資助


Effect of High Frequency Amplitude-Modulated Magnetic Field on Billet Surface Temperature during Electromagnetic Continuous Casting
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    摘要:

    建立電磁軟接觸連鑄結(jié)晶器內(nèi)三維電磁場(chǎng)和溫度場(chǎng)計(jì)算模型，研究采用方波和正弦波調(diào)幅后的高頻調(diào)幅磁場(chǎng)對(duì)鑄坯表面溫度的影響。結(jié)果表明：方波和正弦波調(diào)幅磁場(chǎng)的感應(yīng)熱功率都與調(diào)幅波頻率無(wú)關(guān)。方波調(diào)幅磁場(chǎng)的感應(yīng)熱功率(Q)介于單獨(dú)施加用于調(diào)幅的兩個(gè)恒幅磁場(chǎng)的感應(yīng)熱功率(Q1和Q2)之間，在Q1和Q2確定后，調(diào)幅磁場(chǎng)的感應(yīng)熱功率取決于各自作用時(shí)間T1和T2的相對(duì)比例；正弦波調(diào)幅磁場(chǎng)產(chǎn)生的感應(yīng)熱功率是高頻磁場(chǎng)調(diào)幅前感應(yīng)熱功率的62%~64%

    Abstract:

    A three dimensional finite element mathematical model of electromagnetic field and temperature field was developed to investigate the effect of high frequency amplitude-modulated magnetic field on the billet surface temperature. The results show that the induction heat power of magnetic field amplitude-modulated with sine wave and square wave is unrelated to the frequency of modulating wave. The induction heat power of magnetic field modulated with square wave is between the induction heat powers of the two constant amplitude magnetic fields employed to modulate. If the induction heat powers of the two constant amplitude magnetic fields are determined, the induction heat power of magnetic fields modulated with square wave is determined by the relative scale of the acting time of the two constant amplitude magnetic fields. The induction heat power of magnetic field modulated with sine wave is about 62-64% of that of the high frequency magnetic field before modulation

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王宏明,任忠鳴,李桂榮.電磁連鑄高頻調(diào)幅磁場(chǎng)對(duì)鑄坯表面溫度的影響[J].稀有金屬材料與工程,2010,39(2):347~351.[Wang Hongming, Ren Zhongming, Li Guirong. Effect of High Frequency Amplitude-Modulated Magnetic Field on Billet Surface Temperature during Electromagnetic Continuous Casting[J]. Rare Metal Materials and Engineering,2010,39(2):347~351.]
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  • 收稿日期:2009-01-05
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