Mig (Metal Inert Gas) and Tig (Tungsten Inert Gas) welding are two different types of arc welding processes that use electricity to join metal components. Both processes involve the use of a welding torch, but there are several key differences between the two that make them better suited for different types of applications.
One major difference between Mig and Tig welding is the type of filler material used. In Mig welding, a wire feeding system is used to continuously feed a consumable wire electrode into the weld pool as the weld is being made. This wire acts as the filler material, adding strength and integrity to the weld joint. In contrast, Tig welding uses a non-consumable tungsten electrode to create the arc, and the filler material is added separately by hand using a separate rod. This allows the welder to have more control over the amount and placement of the filler material, but it also requires more skill and precision to do properly.
Another difference between the two processes is the type of shielding gas used. Mig welding uses a mixture of inert gases, such as argon and carbon dioxide, to protect the weld pool from contamination by the atmosphere. Tig welding, on the other hand, uses a pure argon gas shield to protect the weld. This makes Tig welding more suitable for use with certain types of metals, such as aluminum, that are more sensitive to contamination.
A third difference between Mig and Tig welding is the type of power source used. Mig welding typically uses a continuous-wave power source, which provides a constant current flow to the weld. This makes it well-suited for use in high-speed, high-volume production environments. Tig welding, on the other hand, typically uses a high-frequency power source, which provides a pulsed current flow to the weld. This allows the welder to have more control over the heat input into the weld, making it more suitable for use in applications where precision and control are important.
In summary, Mig and Tig welding are two different types of arc welding processes that have their own unique characteristics and are better suited for different types of applications. Mig welding is typically used for high-volume production work and is faster and more efficient than Tig welding, while Tig welding is more precise and allows for more control over the weld, making it better suited for high-quality, critical welds.