3 December 2022

SHIELDING GASES FOR GMAW WELDING

SHIELDING GASES FOR GMAW WELDING

SHIELDING GASES

The primary function of shielding gas is to protect molten weld metal from atmosphere. the shielding gas & flow rate also have effect on the following

  • Arc characteristics
  • Mode of metal transfer
  • Penetration & weld bead profile
  • Speed of welding
  • Undercutting tendency
  • Cleaning action
  • Weld metal mechanical properties

TYPES OF  SHIELDING GASES

  1. CARBON DIOXIDE
  2. ARGON – CO2
  3. ARGON – O2

 Typical bead profiles for argon, helium, argon-helium, & CO2

 

USES OF DIFFERENT SHIELDING GASES FOR GMAW

Leave a Reply

Your email address will not be published.