| 外加磁场对镁合金焊接熔池形态的影响 |
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| 引用本文： | 刘政军,王晓慧,苏允海.外加磁场对镁合金焊接熔池形态的影响[J].焊接学报,2016,37(1):103-106. |
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| 作者姓名： | 刘政军 王晓慧 苏允海 |
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| 作者单位： | 沈阳工业大学 材料科学与工程学院, 沈阳 110870 |
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| 摘 要： | 以镁合金焊接熔池为研究对象,建立了移动热源作用下焊接熔池的三维数学模型. 利用大型通用有限元软件ANSYS将电磁场分析结果导入到热流场分析中,实现电磁场和热流场之间的耦合分析. 模拟了无外加磁场作用下以及外加磁场作用下镁合金焊接熔池的温度场分布和流体流动的速度矢量分布. 结果表明,外加磁场产生的电磁力驱动熔池中熔融的液态金属发生旋转运动,改变了液态金属原有的运动方式和传热方式,流体流动速度和流动范围增加,焊缝熔宽增大,熔深减小. 试验结果验证了模拟结果的可靠性.
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| 关 键 词： | 外加磁场 温度分布 流体流动 数值模拟 |
| 收稿时间： | 2014/12/11 0:00:00 |
Effect of magnetic field on shape of magnesium alloy weld pool |
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| LIU Zhengjun,WANG Xiaohui and SU Yunhai.Effect of magnetic field on shape of magnesium alloy weld pool[J].Transactions of The China Welding Institution,2016,37(1):103-106. |
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| Authors: | LIU Zhengjun WANG Xiaohui and SU Yunhai |
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| Affiliation: | Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China |
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| Abstract: | Taking magnesium alloy weld pool as the research object, a three-dimensional mathematical model of the weld pool under moving heat sources was established. The electromagnetic field analysis is coupled with the heat flow analysis using the finite element software ANSYS. The temperature distribution and the velocity vector distribution of the fluid flow in magnesium alloy weld pool were simulated under the effect of the external magnetic field and without external magnetic field. The simulation results show that the electromagnetic force induced by external magnetic field driving the molten liquid metal occurs a rotary motion, which changed the original movement of liquid metal and heat transfer. The fluid flow velocity and flow range was therefore increased, with increased weld width and reduced depth. The experimental results verify the simulation results. |
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| Keywords: | external magnetic field temperature distribution fluid flow numerical simulation |
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