15 Aug,2025
Plasma arc cutting
Plasma arc cutting involves passing a gas mixture through a high-frequency arc. The gas can be air or a mixture of hydrogen, argon, and nitrogen. The high-frequency arc "breaks down" or ionizes some of the gas into elementary atomic particles, creating "plasma." The arc then leaps onto the stainless steel workpiece, where high-pressure gas propels the plasma out of the torch burner at an exit velocity of 800 to 1000 meters per second
This, combined with the high energy released when the various gases in the plasma return to their normal state, produces a high temperature of 2700°C, nearly twice the melting point of stainless steel. This causes the stainless steel to melt rapidly, and the molten metal is blown away by the ejected high-pressure airflow. Therefore, fume extraction and slag removal equipment are required.
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