General
What does TIG stand for?
Tungsten Inert Gas
What is tungsten classified as?
A non-consumable electrode with a very high melting point.
What polarity is used for ferrous metals?
Direct Current-DC
What is the purpose of the gas nozzle?
Directs the flow of shielding gas to the tungsten and weld puddle
What is the average flow rate for shielding gas?
20-35
What are 2 common uses for TIG?
Welding root passes on pipe and thin gauge metals
What type of filler rod is used for mild/carbon steel?
ER70S2
What direction does DCEP flow?
Current flows from workpiece to electrode and is rarely used in TIG due to lack of penetration
What is the purpose of the collet body?
Delivers shielding gas to the nozzle
What is the purpose of the foot pedal?
Aids in controlling the amperage and heat
What process needs selected on the welder when using the foot pedal?
What type of filler rod is used for Stainless steel?
Er308L
What direction does DCEN flow?
Current flows from electrode to workpiece
What is the purpose of the collet?
Goes into the collet body and conducts the current to the tungsten
What is the difference between air-cooled and water cooled torches?
Air cooled is rated for short cycles of welding under 200 amps
Water cooled is rated for long welding periods and up to 200 amps
What process needs to be selected when not using the foot pedal?
Lift Arc
What are the benefits of an inert gas?
It does not react with other metals and gases. Creates a protective bubble around arc and weld puddle.
What materials are used with AC and what does it stand for?
Non-ferrous metals and Alternating Current
What is the purpose of the torch holder?
Holds everything together and is connected to the power source
Explain the parts of the filler rod ER308L
ER- electrode/rod
308 - grade of stainless
L - low carbon rod
What are the filler rod and tungsten sizes? (Largest to smallest.)
1/8, 3/32, 1/16
What are 3 benefits to using 100% Argon?
2. Requires a lower flow rate
3. Low cost
What percentage of the heat is directed to the base metal when using DCEN?
70%
What are 3 things that determine what type of tungsten you should use?
Material type, material thickness, and polarity
Explain the parts of the Filler rod ER4043
ER-electrode/rod
4 - 4000 series aluminum
043 - amount of silicone added to the rod