Tig welding

Tig welding

1. torch

   • split collet
   • back cap
   • gas lens
   • ceramic nozzle
   • tungsten

2. power sources

   • DC
     • used for most ferrous metals
   • AC
     • used to remove oxide fillm

3. tungsten electrodes

   • thoriated
   • zirconium
   • ceriated

4. shielding gases

   • argon
   • helium
   • argon/helium mix

5. filler rods

   • mild steel
   • stainless steel
   • alumimium

6. starting methods

   • HF start
   • DC lift
   • scratch start

7. health and safety

   • PPE
     • overalls
     • welding screen
     • tig gloves
     • steel toe cap boots

8. techniques

   • weaving
   • bead