What is Metal Inert Gas (MIG) Welding?

MIG welding is an arc welding process wherein coalescence is produced by heating with an arc between a continuous filler metal (consumable) electrode and the work. Shielding is obtained entirely from an externally supplied gas or gas mixture. MIG welding requires the use of an inert shield gas.

Inert gases include:

  • helium.
  • argon.
  • carbon dioxide.

Helium provides the highest welding speed and deposition rate of all the inert gases.

MIG welding can be used on a variety of materials, including aluminum, stainless steel, and carbon steel. It is a versatile welding process that can be used in many different applications.

MIG welding is a safe welding process when proper safety precautions are followed. However, like all welding processes, there is always a risk of injury when working with hot metals and electrical equipment.

What is the function of metal inert gas MIG?

MIG welding is an arc welding process that uses an electrode made of a thin wire that is fed through a welding gun. The electrode is connected to a power source and when it touches the metal, an electric arc is created. The arc melts the wire and the metal, which creates a weld pool.

Inert gas is used to shield the weld pool from oxygen and other contaminants in the air. This helps to create a stronger, more durable weld.

What type of inert gas is used for MIG welding?

The most common type of inert gas used for MIG welding is argon. Argon is less expensive than helium and provides a good compromise between welding speed and cost. Carbon dioxide can also be used, but it has the highest risk of porosity.

What are the advantages of metal inert gas welding?

MIG welding is a fast, efficient way to weld metal. It is often used in high-production environments where speed and efficiency are paramount. MIG welding can also be used in difficult-to-reach places and in situations where other welding processes would be impractical.

What are the disadvantages of metal inert gas welding?

MIG welding produces a lot of heat, which can damage sensitive materials. It can also be difficult to control the weld pool and create a consistent weld.

Related Links

Gas metal arc welding
Metal Inert Gas (MIG) and Metal Active Gas (MAG) welding | Linde Gas
Metal Inert Gas Welding (MIG, GMAW) [SubsTech]
MIG Welding: The Basics for Mild Steel | MillerWelds
What is Gas Metal Arc Welding? (MIG Welding / MAG Welding) – TWI

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