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Advantages Disadvantages and Applications of MIG OR GMAW Welding -
1. Because of continuously fed electrode, MIG welding process is much faster as compared to TIG or stick electrode welding.
2. It can produce joints with deep penetration.
3. Thick and thin, both types of workpieces can be welded effectively.
4. Large metal deposition rates are achieved by MIG welding process.
5. The process can be easily mechanized.
6. No flux is used. MIG welding produces smooth, neat, clean and spatter free welded surfaces which require no further cleaning. This helps reducing total welding cost.
7. Higher arc travel speeds associated with MIG welding reduce distortion considerably.
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Disadvantages
1. The process is slightly more complex as compared to TIG or stick electrode welding because a number of variables (like electrode stick out, torch angle, welding parameters, type and size of electrode, welding torch manipulation, etc.) are required to be controlled effectively to achieve good results.
2. Welding equipment is more complex, more costly and less portable.
3. Since air drafts may disperse the shielding gas, MIG welding may not work well in outdoor welding applications.
4. Weld metal cooling rates are higher than with the processes that deposit slag over the weld metal.
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Applications
1. The process can be used for the welding of carbon, silicon and low alloy steels, stainless steels, aluminium, magnesium, copper, nickel, and their alloys, titanium, etc.
2. for welding tool steels and dies.
3. for the manufacture of refrigerator parts.
4. MIG welding has been used successfully in industries like aircraft, automobile, pressure vessel, and ship building.
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