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MIG Welding

Gas Metal Arc Welding (GMAW) is frequently referred to as MIG welding. MIG welding is a commonly used high deposition rate welding process. Wire is continuously fed from a spool. MIG welding is therefore referred to as a semiautomatic welding process.

MIG Welding Benefits

* All position capability
* Higher deposition rates than SMAW
* Less operator skill required
* Long welds can be made without starts and stops
* Minimal post weld cleaning is required

MIG Welding Shielding Gas

The shielding gas, forms the arc plasma, stabilizes the arc on the metal being welded, shields the arc and molten weld pool, and allows smooth transfer of metal from the weld wire to the molten weld pool. There are three primary metal transfer modes:

 * Spray transfer
* Globular transfer
* Short circuiting transfer

The primary shielding gasses used are:

* Argon
* Argon - 1 to 5% Oxygen
* Argon - 3 to 25% CO2
* Argon/Helium

CO2 is also used in its pure form in some MIG welding processes. However, in some applications the presence of CO2 in the shielding gas may adversely affect the mechanical properties of the weld.

Common MIG Welding Concerns

We can help optimize your MIG welding process variables. Evaluate your current welding parameters and techniques. Help eliminate common welding problems and discontinuities such as those listed below:
 

Weld Discountinuties

  •  Undercutting
  •  Excessive melt-through
  •  Incomplete fusion
  •  Incomplete joint penetration
  •  Porosity
  •  Weld metal cracks
  •  Heat affected zone cracks

Mig weld of Pipe

Close up of Mig Weld
Common MIG Welding Concerns

We can help optimize your MIG welding process variables. Evaluate your current welding parameters and techniques. Help eliminate common welding problems and discontinuities such as those listed below:
Weld Discontinuities

* Undercutting
* Excessive melt-through
* Incomplete fusion
* Incomplete joint penetration
* Porosity
* Weld metal cracks
* Heat affected zone cracks


MIG Welding Problems

* Heavily oxidized weld deposit
* Irregular wire feed
* Burnback
* Porosity
* Unstable arc
* Difficult arc starting

If your company is experiencing these or other welding problems you can  improve your weld processing. Hire decostyle technics to act as your welding specialist.

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