TIG Welding Basics Part 1

tig welding yields clean, low-spatter joints and allows independent filler material and current, using a protective inert gas envelope (argon/helium) and ac for aluminum, plus high-frequency or contact ignition.

Position the tungsten electrode in the torch, protruding 2-5 mm from the nozzle. Match electrode tip angle and type to control arc, penetration, and gas coverage.

Master the TIG welding basics, including inert gas shielding, electrode handling, and filler wire feeding, while maintaining constant distance and correct torch angles for a consistent seam.

Learn to weld a square butt TIG seam in the flat position, including arc ignition, filler feed at the weld pool edge, and a stable distance with proper gas flow.

Perform a horizontal-vertical tig fillet weld with slight tungsten protrusion, increased current, torch at 45 degrees and conducted at 80–85 degrees to the fillet, and feed filler to the center.

Position the torch comfortably, at 90 degrees with a 45–55 degree travel, feed filler wire at 25 degrees, and start with low current to manage vertical butt seam weld pool.

Weld uphill with the torch at 80–85 degrees, moving bottom to top; heat concentrates, reducing current while feeding filler wire from above.

Describe the round fillet weld where a round workpiece meets a flat one, using a 45° torch and a protruding electrode to heat the weld pool in the groove center.

Align two sheets at a 45° angle to abut. Spot-weld ends, then weld top edge end-to-end without filler wire, using a 60° torch and a constant electrode distance.