Solidification Structure Control by the Interaction of Pulsed Magnetic Field and Melt

Solidification Structure Control by the Interaction of Pulsed Magnetic Field and Melt
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脉冲磁场与熔体相互作用的凝固结构控制

DOI:
10.1016/j.promfg.2019.12.097
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发表时间:
2019
期刊:
Procedia Manufacturing
影响因子:
--
通讯作者:
Tianjiao Luo
Tianjiao Luo
中科院分区:
其他
文献类型:
--
作者:
Yuansheng Yang;Kuiliang Zhang;Yingju Li;Xiaohui Feng;Tianjiao Luo

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电磁场因其控制凝固过程的有力手段而日益受到人们的关注。在凝固过程中利用电磁场传递过程可以有效地控制凝固组织。例如,基于脉冲磁场和金属熔体的相互作用,合金的铸态晶粒尺寸可以细化到50-100 μ m左右。数值模拟和实验结果表明,脉冲磁场在镁合金凝固过程中引起熔体振动和非熔体对流。通过控制这些因素,在凝固初期加速成核,并在凝固过程中发生柱状向等轴转变。利用脉冲磁场对凝固组织进行智能控制,发展了磁控铸造技术。
The electromagnetic field is interested increasingly for its powerful means to control the solidification process. The solidification microstructure can be effectively controlled by the transfer processes with electromagnetic field during solidification. Based on the interaction of the pulsed magnetic field and metallic melt, for example, the as-cast grain size of alloys can be refined to about 50-100 um. The numerical simulation and experimental results show that the pulsed magnetic field causes melt vibration and but melt convection during the solidification of magnesium alloys. By controlling these factors, the nucleation is accelerated at the early solidification stage and a columnar to equiaxed transition occurs during the solidification processing. Magnetic controlled casting technology has been developed by research on intelligent control of solidification structure with the pulse magnetic field.
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