Equipment Considerations and Technique. This configuration directs roughly two-thirds of the arc’s heat onto the workpiece, providing exceptional penetration while keeping the electrode cool.
Understanding TIG Current Type and Its Impact on Metal Oxide Film
The Welding Stage (DCEN): During the DCEN phase, the heat is transferred to the puddle, allowing for efficient melting of the base metal and filler rod. The current alternates between DCEN and DCEP (Direct Current Electrode Positive), creating a balanced effect that solves the problems inherent in each individual mode.
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. Limitations: DCEN struggles with oxide removal.
Understanding AC/DC Currents for TIG Metal Oxide Film Removal
Copper and brass can be welded with DCEN, though AC is sometimes used for cleaning shiny or heavily oxidized surfaces. Direct Current Electrode Negative (DCEN) Penetration and Cleaning Action DCEN is the most common mode for standard TIG welding of steel and stainless steel.
More About Ac or dc tig welding
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