Welding mig

MIG welding
MIG weldingMIG welding (metal welding with inert gases) is a so-called arc welding procedure.
The wire is guided directly to the welding point by means of a contact sleeve (1). During the MIG welding process, shielding gas (3) is added through a nozzle.
This prevents oxygen from penetrating the weld pool (4) and therefore protects against oxidation. Oxidation would cause weakening of the weld and therefore to reduced quality. The finished weld is also called a weld run or bead (5).
While MAG welding works with active gases and is primarily used to make steel joints, MIG welding uses inert gases to weld non-ferrous metals. The inert gas used is argon, in rare cases helium (is more expensive) or mixtures of these are used. As the gases used do not react with the parent metal and additive materials, MIG welding is mainly used to join copper, aluminium or aluminium alloys as well as for other non-ferrous metals.
Inert gases enable welding at much higher temperatures. As the shielding gas is driven away due to weather, e.g. wind, MIG welding can only take place indoors.
This type of welding is used to make pipes and vessels, in mechanical engineering, in precision engineering and in nuclear engineering.
In MIG welding a differentiation is made between different arcs:
Welding with short arc
In low performance ranges, root welds and welding in uncomfortable positions or positional welding is carried out. It is primarily used to join thin metal sheets. An almost smooth material crossover results, as only a few splashes (sputter) and fine drips are produced.
Spray arc welding
This is used to join thicker metal sheets. The low-sputter, short-circuit-free and fine-drop material transition is created by the high degree of melting and high speeds of welding with argon-based mixed gases.
Pulsed arc welding
This type of arc welding is used for all sheet and plate thicknesses. This welding procedure tends to be used in the medium performance range. Depending on the requirements, it is possible to control the thickness or size of the droplets produced during welding.
Advantages of MIG welding:
No slag is produced by MIG welding. This welding procedures has also established itself most due to its positional welding capabilities (i.e. working in constrained or confined positions). It has developed into the most used welding procedure.
Disadvantages of this welding method:
If MIG welding were to be used outdoors, the shielding gases would inevitably drift away. This metal shielding gas welding can only be carried out in enclosed rooms, i.e. indoors.



While MAG welding works with active gases and is primarily used to make steel joints, MIG welding uses inert gases to weld non-ferrous metals. As the gases used do not react with the parent metal and additive materials, MIG welding is mainly used to join aluminium, copper or aluminium alloys as well as for other non-ferrous metals.
As the shielding gas is driven away due to weather, e.g. wind, MIG welding can only take place indoors. In low performance ranges, root welds and welding in uncomfortable positions or positional welding is carried out. If MIG welding were to be used outdoors, the shielding gases would inevitably drift away.