What is Gas Metal Arc Welding (GMAW)?

Gas metal arc welding (GMAW) is a type of welding that uses an electric arc to heat the metals being joined. The arc is created by an electrode, which is usually made of a consumable metal such as copper or aluminum. The electrode is connected to a power source, and as it touches the metal being welded, an arc is created. The heat from the arc melts the metal, and as the electrode is moved along the seam, a weld is formed.

GMAW is a popular welding method because it is relatively easy to learn and can be used on a variety of metals. It is also a versatile welding process, as it can be performed in a number of ways, including automatic, semi-automatic, and manual welding.

Advantages of GMAW

There are several advantages to gas metal arc welding:

One is that it is a relatively clean process, as there is no need to use flux or other chemicals.
This also makes it a fast welding method, as there is no need to clean the metals before or after welding.
In addition, the arc can be easily controlled, making it possible to create high-quality welds.

Disadvantages of GMAW

There are also some disadvantages to gas metal arc welding:

One is that it can be difficult to see the weld area, as the arc emits ultraviolet light. This can make it difficult to detect defects in the weld.
In addition, the heat from the arc can cause the metal to expand, which can lead to distortion of the metal.
Finally, gas metal arc welding is not recommended for use on thin metals, as the heat from the arc can cause burn-through.

Which gas is used in gas metal arc welding?

The gas used in gas metal arc welding depends on the type of metal being welded. For example, when welding aluminum, an inert gas such as argon is used.

Resistance welding

It is a welding process that generates the coalescence of workpieces by applying pressure and passing a current through the contact area of the workpieces. The heat required for welding is obtained from the resistance to the flow of electric current.