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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
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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 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 you are experiencing these or other welding problems and need consulting
services, contact us to improve your
weld processing.
Contact Information
- Telephone
- 407-880-4945 ----------- Consulting assistance is only available for customers
- FAX
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- Postal address
(greater Orlando area)
- AMC
- 380 S. State Road 434
- Suite 1004 - #166
- Altamonte Springs, FL 32714
- Electronic mail
- General Information: Consulting@MaterialsEngineer.com
Customer Support: Support@MaterialsEngineer.com
Webmaster: Help@MaterialsEngineer.com
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