Mig vs Tig welding, is a an argument welders have constantly. What’s the difference and which one is better? The answer is not simple. But both welding procedures are different in terms of the process used to join metal.
MIG welding stands for Metal Inert Gas welding, it has a couple of terminologies such as metal active gas or gas metal arc welding. It uses gas as a shield from contaminant from the air. During welding there are contaminants in the air such as hydrogen and oxygen which may react with the electrode and make a messy job while welding, producing spatter. Therefore this shielding gas prevents the contamination.
Basically, during welding, the heat produced causes the metal to heat up and it melts together with the electrode thus joining the pieces together.
For this type of welding, a constant voltage of power is used rather than ac. During welding, the metal is transferred using a number of processes which are; Spray, Pulsed-spray, Globular and Short-circuiting spray.
MIG was originally destined to weld aluminum materials together but later on it was started on steel because it was the fastest form of welding. These inert gas was initially used to fuse, and at that time it was quite expensive and hard to come by thus it limited its use. After a couple of years, semi-inert gasses were discovered such as carbon dioxide, and it was found that they too can be used for welding. The process underwent a couple of tests and developments until it became a highly used industrial process.
Advantages of metal inert gas welding:
- It makes possible for a wide range of metals to be joined.
- You can perform your welding activities in any position you like.
- A good welding bead is easy to get going.
- Learning to Mig weld is quite easy.
- Welding splatter is not a problem.
Disadvantages of metal inert gas welding:
- By using the different types of inert gases, it will limit the mobility of this type of welding in comparison to the others.
- The metals which can be welded are either thin or medium thin metals.
- Compared to tungsten inert gas welding, it produces a sloppier welding job.
- This form of welding is very industrious because it is not limited and a number of metals can be welded using this method.
- Tungsten Inert Gas(TIG) Welding
This form welding is one which the use of tungsten electrodes are used to perform the welding activity. It also requires a shielding gas which prevents contamination from air components such as oxygen and hydrogen. The contamination brings about a reaction whose final results is splatters.
Steps to follow when using TIG welding:
1. Choosing the right electrode. The first step in tig welding is the choice of the electrode; you have to choose the right wire for your TIG. For aluminum materials, the best wire to use is tungsten alloys rods or pure tungsten rod.
2. Grinding the electrode. The electrode normally does not have a pointed end when it is new, therefore after choosing the right wire, you have to grind one end until it becomes sharp or rounded. A sharp end will give you direct and smaller arc which is the best in this type of welding.
3. Inserting the electrode into the collect. After grinding the wire, you have to insert it into its electrode holder; this can be done by unscrewing the magnetic holder and inserting the electrode and screwing it back until it has been tightly grasped.
4. Choose the welding setting: There are three electricity options which you have to choose from. You will pick the right choice depending on the metal you are welding.
The three options are:
Ø DCEP and
AC is mostly used for aluminum, DCEP for tungsten tips and lastly DCEN is for welding steel.