Control of the Distribution of Vacuum Arcs Within Vacuum Arc Remelting with Externally Applied Magnetic Fields

Control of the Distribution of Vacuum Arcs Within Vacuum Arc Remelting with Externally Applied Magnetic Fields
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外加磁场真空电弧重熔过程中真空电弧分布的控制

DOI:
10.1007/978-3-030-36540-0_25
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发表时间:
2020
期刊:
The minerals metals materials series
影响因子:
--
通讯作者:
Motley, Joshua
Motley, Joshua
中科院分区:
--
文献类型:
--
作者:
King, Paul E.;Cibula, Matthew;Motley, Joshua

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Ampere Scientific之前开发并提供了varmetrictm测量系统的工业验证,用于测量高温特种合金真空电弧重熔(VAR)期间电弧的位置。随着varmetrictm的出现,现在可以连续监测和控制电弧分布,以便在VAR过程中调整驱动凝固的热通量。实验室实验应用横向磁场来产生指定的洛伦兹力作为控制机制,以驱动电弧位置到预定的分布。这种类型的控制可以在VAR操作期间对不良电弧条件做出反应,或者提供连续控制,以指定热输入熔池的热分布,以确保无缺陷铸锭。
Ampere Scientific has previously developed and provided industrial validation of theVARmetricTMmeasurement system to measure the location of electric arcs during vacuum arc remelting (VAR) of high temperature specialty alloys. With the advent ofVARmetricTM, it is now possible to continuously monitor and control arc distributions in order to tailor the heat flux that drives solidification during the VAR process. Laboratory experiments have applied transverse magnetic fields to generate specified Lorentz forces as a control mechanism across the arc gap in order to drive arc locations to predetermined distributions. This type of control makes it possible to react to undesirable arc conditions during VAR operations or to provide a continuous control to specify a thermal profile for heat input to the melt pool necessary for ensuring defect-free ingots.
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