(東北大學(xué) 材料電磁過(guò)程研究教育部重點(diǎn)實(shí)驗(yàn)室， 沈陽(yáng) 110004)
摘 要: 通過(guò)實(shí)驗(yàn)測(cè)試和數(shù)值模擬的方法研究?jī)啥问杰浗佑|電磁連鑄無(wú)縫結(jié)晶器結(jié)構(gòu)、 線圈位置、 電源功率以及彎月面位置等因素對(duì)結(jié)晶器內(nèi)高頻磁場(chǎng)分布的影響。 并采用Sn作為鋼液的模擬工質(zhì)測(cè)量了不同實(shí)驗(yàn)條件下兩段式結(jié)晶器內(nèi)的彎月面高度。 研究結(jié)果表明： 兩段式結(jié)晶器的透磁效果隨著結(jié)晶器上半段厚度的減薄而提高； 增加電源功率時(shí)， 可以增大高頻磁場(chǎng)在鑄坯初始凝固區(qū)域的強(qiáng)度及作用范圍， 有利于彎月面的形成； 線圈位置越靠上， 越有利于磁感應(yīng)強(qiáng)度透過(guò)結(jié)晶器， 有助于彎月面高度的增大； 當(dāng)金屬液面位于感應(yīng)線圈高度中心與線圈頂端位置之間時(shí)， 高頻磁場(chǎng)作用于初始凝固區(qū)域的有效作用較強(qiáng)， 可產(chǎn)生較大的電磁壓力， 有助于獲得高表面質(zhì)量的鑄坯。
關(guān)鍵字: 軟接觸電磁連鑄; 電磁冶金; 高頻電磁場(chǎng); 兩段式; 無(wú)縫結(jié)晶器; 彎月面
WANG En-gang, HE Ji-cheng
（Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials, Northeastern University, Shenyang 110004, China）
Abstract: The experimental measurement and numerical simulation were used to study the magnetic field distribution in the two-stage soft contact electromagnetic continuous casting slit-less mold. And the height of molten metal meniscus was measured under different magnetic field conditions where Sn was used as the simulated media of molten steel. The results show that the penetration of magnetic field in the mold increases with the thickness of mold upside part decreasing. By increasing the electric power, the intensity and the effective range of the magnetic field in the region of initial solidification become larger. When the coil level gets closer to the mold top, it is much easier for the magnetic field to penetrate into the mold, and the height of meniscus becomes higher accordingly. When the meniscus level is located between the coil top level and coil center level, the effect of the high frequency magnetic field on the region of initial solidification for billet is largest, and the magnetic field distribution becomes uniform, which is helpful to improving the billet surface quality.
Key words: soft contact electromagnetic continuous casting; electromagnetic metallurgy; high frequency electromagnetic field; two-stage; slit-less mold; meniscus
