The course provides an overview of the fundamental principles of gas tungsten arc welding (GTAW), or TIG welding, which is an arc welding process that uses a non-consumable tungsten electrode to create an arc and join metal. It requires shielding gas, mostly pure argon or argon mixed with helium. Participants acquire TIG welding skills applicable to various materials and welding positions.
An additional fee is required.
Prerequisites
None
1. Identify GTAW (TIG) power sources, torch components, gas delivery systems, and filler metals, and perform safety inspections and basic external maintenance in accordance with shop procedures.
2. Set up GTAW equipment—including polarity, amperage, shielding gas flow, and tungsten preparation—for welding plain carbon steel, aluminum, and 3XX stainless steel.
3. Perform GTAW surfacing welds (bead on plate) in the flat position on plain carbon steel, aluminum, and 3XX stainless steel while demonstrating proper arc length, torch angle, and filler rod control.
4. Produce fillet welds in the flat, horizontal, and vertical positions on plain carbon steel using GTAW techniques that meet visual acceptance criteria.
5. Complete groove welds in the horizontal, vertical, and overhead positions on plain carbon steel using GTAW, demonstrating consistent penetration, fusion, and bead profile.
6. Perform GTAW welds on plain carbon steel that meet AWS workmanship standards, including acceptable fusion, contour, coloration, and absence of common discontinuities.
7. Produce fillet welds in horizontal and vertical positions on aluminum using GTAW with proper heat control and shielding gas protection.
8. Complete groove welds in the flat and vertical positions on aluminum using GTAW, demonstrating stable arc control and suitable weld metal deposition.
9. Produce fillet welds in horizontal and vertical positions on 3XX stainless steel using GTAW while maintaining proper heat input to minimize distortion and preserve corrosion resistant properties.