Hello! My name is Mac and on behalf of expertvillage.com
I am here to discuss the arc welding process called MIG welding. MIG is a short form that
stands for Metal Inert Gas welding, it is a very popular, easy to use arc welding process.
It consists of a very high strength steel wire coiled in a roll, a set of drive rollers,
a power supply, a MIG gun and a supply of inert gas to shield the weld pool. It is very
versatile, the wires come in a wide variety of metals for different users. You can get
ordinary carbon steel wire, even though this looks like copper wire, it is actually carbon
steel wire covered with copper, a thin layer copper tip to aid in the welding process.
It helps the electricity to get on to the wire, as it goes to the contact tip. You can
get stainless wires, you can get nickel wires, you can get wires for welding galvanized steel,
very popular wire for welding aluminum. You can get aluminum welding wires etc. They come
in a wide variety of diameters, different sizes of thickness of wire for different applications
and for different machines. One of the integral parts of the machine is a bottle of compressed
inert gas that is fed through the gun. The gas is used to protect the arc welds molten
puddle from the oxygen and nitrogen in the atmosphere. We will go into this whole system
in greater detail as we go through the series of lectures on MIG welding.