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纸质出版日期： 2024-03-25 ，
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闫志航，王文先，卞功波，等.电脉冲轧制6061Al电热耦合模型及电弧加热机理分析［J］.电焊机，2024，54（3）：24-29.
YAN Zhihang, WANG Wenxian, BIAN Gongbo, et al.Modeling of Electrothermal Coupling and Analysis of Arc Heating Mechanism of 6061Al in Electric Pulse Rolling[J].Electric Welding Machine, 2024, 54(3): 24-29.
通过COMSOL Multiphysics仿真软件模拟高频脉冲电流激励时两板间界面处电弧的产生。讨论了在高频脉冲电流激励下，两块具有一定角度的金属板在电脉冲辅助轧制过程中界面处产生电弧的条件，并结合电磁学分析了电弧的形成机理。结果表明，在电脉冲辅助轧制过程中，除了焦耳加热外，还存在电弧加热现象，当加载300 A电流和10 kHz频率时，可以产生电弧并使两块铝板结合形成焊点。随着电流的增加，电弧温度和电势差也相应增加。在800 A电流下，电弧温度可达4 210 K，电势差可达54.5 V，已达到电弧形成的条件，但产生的电弧并不稳定。电弧的存在不仅瞬间加热了板材，提高了界面结合强度，而且在电弧力的作用下更容易形成波纹界面。模拟结果显示，加载800 A电流下可以产生超过4 000 K的电弧，并且在第一个脉冲周期内形成；并拟合了电弧产生的热源方程；为电脉冲辅助轧制研究提供了新思路。
In this article
the COMSOL Multiphysics simulation software is used to simulate the generation of arcs in a circuit when excited by a high-frequency pulsed current. Under the excitation of high-frequency pulse current
the conditions of arc generation near the surface tip of two metal plates with a certain angle and rough surface are discussed
and the formation mechanism of the arc is analyzed combined with electromagnetics. The results show that in the electric pulse-assisted rolling process
in addition to Joule heating
there is also the phenomenon of arc heating
which can generate an arc and cause two aluminum plates to combine to form a welded joint when loaded with a current of 300 A and a frequency of 10 kHz. As the current increases
the arc temperature and potential difference increase accordingly. At a current of 800 A
the arc temperature is 4 210 K and the potential difference is 54.5 V. The conditions for arc formation have been met
but the resulting arc is not stable.When loaded at 800 A
an arc of over 4 000 K can be generated and a welded joint formed within the first pulse cycle
and the heat source equation for arc generation is fitted.
电脉冲轧制电弧热分析超声波电弧高频脉冲电流粗糙表面
electric pulse assisted rollingarc thermal analysisultrasonic archigh-frequency pulse currentrough surface
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