When you are talking about the most used welder, one of this is the MIG welder. It is this type of welding that uses the process known as the GMAW or the gas metal arc welding. The electrode which is the wire is fed into the welding gun. It is also here that there is a use of the continuous flow of inert gases. The gases are used to protect the weld as it cools.
For general welding, the kind of gas that is commonly used is the carbon dioxide. Creating a good weld can be done with this gas and it is also very cheap. Argon can also be mixed so that the arc will have less spatter which can give you a cleaner weld. It is when you are welding aluminum that it is a must that you will be using pure argon gas.
Compared to all the other welding process, it is the GMAW that has many benefits. It is by using the welding gun that you can position the electrode properly without striking any arc. The moment that you have it in the right position, then all you have to do is to pull the trigger.
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You will have seams that are smooth and clean because of the insert shielding gases. It is this one that you will not be needing to chip off any slag. Whe y are working with sheet and thin metals, then a MIG welders are also perfect for it. By welding in lower amperage that you will be able to do this one. It is a MIG welder that also use DC in order to strike the arc. It is when you will use AC that you will not be having a steady arc.
The voltage, amperage and the speed can also be adjusted in a MIG welder. It is a MIG welder that you can also control the flow of gas because of the valve that it have, making the tensioner on the welding wire variable.
You can also use a MIG welder without using any gas at all. It is this one that is called as an FCAW or flux cored arc welding. It is this one that uses a wire that has a hollow core that is filled with flux.
It is also the FCAW that can be done outside since there is no shielding gas that will be blown away. If you are working with thick metals, then the FCAW is also great as the flux core wire is much hotter. But the downfall is that there are slags that you need to remove after the weld similar to his those of an ordinary welder. Thinner and light sheet metals can also be weld by an FCAW.