Differences between MIG welding and TIG when machining

When carrying out the welding process for machining materials , two types of welding can be used : the MIG (or welding with protective metal gas ) and the TIG (or welding with Tungsten gas ). In this blog post we will see the MIG and TIG welding carefully. To see how these two welds are, their advantages and also their differences.

MIG and TIG welding differences

MIG welding

When using this welding to machine, an electric arc is established between the electrode , (which has the form of a continuous wire) and the piece that is welded . The gas is inert , in the case that the gas is active , the welding will be known as MAG . There are different ways to perform the soldier with MIG , manually, automatically or semiautomatically .

It can be used for small and medium thicknesses in steel structures and aluminum alloys . It can be used for steel applications, but also for non-ferrous materials.

Techniques with MIG welding:

  • Transfer by short circuit . When the short circuit is concrete, there is a mental change. The tip of the wire is connected to the weld already melted.
  • Transfer by spraying . It occurs when the small drops of mint are removed from the tip of the wire and are projected towards the weld.
  • Globular transfer . It occurs when said metal drops are too large to sink.

Advantages of using MIG welding:

  • Increased productivity by eliminating downtime by replacing electrodes that have already been consumed.
  • It is possible to weld in any position .
  • Cutting times are reduced .
  • Decrease in cord discontinuities , giving a good finish.

TIG welding

This welding is characterized by the use of a permanent tungsten electrode , alloyed with thorium or zirconium . Currently, thorium is banned because it is highly damaging to health.

It is used when we have to make the pieces on the side and then finish the job with some welding . TIG welding with aluminum or magnesium structures is used . In addition, it is a system with gaseous protection that uses the heat of the electric arc between the tungsten electrode and the piece to be welded.

Advantages of using TIG welding:

  • It delivers high quality welding on all metals, even those difficult to weld.
  • It is used to weld thin-gauge metals .
  • It is a stronger solder, more resistant to corrosion and more ductile .
  • No need to clean after welding the piece. No splashes or sparks are produced.
  • The welding area is very visible , thanks to being gaseous protection.
  • The system can be automated , mechanically controlling the gun and the metal.

A summary of the differences

  • Electrodes

TIG welding uses a tungsten electrode that is not consumed during the welding process, while MIG welding uses a metal electrode that serves as a filler for welding and is consumed during welding.

  • Filling material

TIG welding a separate filler material is used since the electrodes are not consumed this is different from MIG welding, which delivers the filling material through the electrode.

  • Difficulty

  MIG welding is less difficult than TIG welding  this difference is because with TIG the tolerances have to be more stringent between the electrode, the filler rod and the workpiece.

  • Applications

TIG welding can be applied to almost any metal, from steel to aluminum and exotic alloys. It is used when you have to make the pieces on the side and then finish the job with some welding.

It also serves to weld thin-gauge metals and has a stronger, corrosion-resistant finish.

In addition, the system can be automated, mechanically controlling the gun and the metal.

MIG welding was developed to weld non-ferrous metals, but can be applied in steel and aluminum structures. On the other hand, there are different ways to perform the soldier with MIG, manually, automatically or semiautomatically. It can be used for small and medium thicknesses, and it is possible to weld in any position.


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