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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Diagnostics of cathode material loss in cutting plasma torch
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Diagnostics of cathode material loss in cutting plasma torch

机译：切割等离子炬时阴极材料损失的诊断

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A cutting plasma torch was observed in several ways by a high-speed camera with a focus on the cathode area. In the first experiment, the plasma arc between the nozzle tip and anode was recorded in a series of duty cycles ranging from new unworn cathodes to cathode failure due to wear and material loss. In the second experiment, we used a specially modified nozzle to observe the inside area between the cathode and the nozzle exit through a fused silica window. Finally, using tilted view, we observed a pool of molten hafnium at the cathode tip during the plasma torch operation. The process of cathode material melting, droplet formation, their expulsion and rate of cathode material loss was examined.
机译：用高速相机以几种方式观察到切割的等离子炬，重点放在阴极区域。在第一个实验中，以一系列占空比记录了喷嘴尖端和阳极之间的等离子弧，这些占空比范围从新的未用过的阴极到由于磨损和材料损失引起的阴极故障。在第二个实验中，我们使用了经过特殊改进的喷嘴，以观察阴极和喷嘴之间通过熔融石英窗口的内部区域。最后，使用倾斜视图，我们在等离子炬操作期间在阴极尖端观察到熔融的pool池。检查阴极材料熔化，液滴形成，其排出和阴极材料损失速率的过程。

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