The Cleaning Stage (ACNE): During the ACEN phase (Electrode Positive), the intense heat on the workpiece strips away the refractory oxide layer, ensuring a clean weld puddle. In this setup, the electrode is negative, and the workpiece is positive.
Understanding DCEN and DCEP for Metal Conductivity in TIG Welding
Waveform Management: Modern AC TIG machines allow users to adjust the balance between cleaning and welding. Copper and brass can be welded with DCEN, though AC is sometimes used for cleaning shiny or heavily oxidized surfaces.
Magnesium and its alloys also necessitate AC, though often at lower amperage settings than aluminum to prevent electrode erosion. Equipment Considerations and Technique.
Understanding DCEN and DCEP for Metal Conductivity in TIG Welding
Electrode Stability: The electron bombardment causes the tungsten to ball slightly, creating a stable arc column that reserves wandering. Attempting to weld steel with AC is generally inefficient, as it cools the workpiece during the cleaning phase, reducing penetration.
More About Ac or dc tig welding
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