Welding or soldering is a technique that allows parts to be joined together by fusing them, while ensuring continuity. The joining can be done in different ways: heating, pressure, etc. The choice of welding method depends on several factors such as the thickness of the material to be welded, the welding location, the welding position, the composition of the steel, etc. Zoom in on the welding technologies.
This is a semi-automatic method that uses electrical heat to provide heating of the metal to be welded and the filler metal. The aim is to reach the melting point of both elements. The procedure is usually carried out under gas shielding to protect the weld pool from oxidation.
To clarify, MIG is a propelled inert gas while MAG is an active gas. The choice of gas varies according to the welding technique chosen. In addition, MIG/MAG welding machines often have a continuous wire feeder. For more information on these machines, find out here.
Pulse and double pulse MIG welding
This is a semi-automatic method characterised by a variation in the current produced by the generator. This produces a very accurate waveform during the operation. Pulsed MIG welding has the advantage of limiting the risk of deformation by releasing less energy.
It uses electrical transformers that allow an electric arc to be created between an electrode and the parts to be joined. TIG welding thus allows the fusion of the main metals such as steel, stainless steel, aluminium... Moreover, it uses an inert gas such as argon which is moreover the most common.
Here, welding is done by bringing a flame directly to the parts to be welded. It can be done by the gas welder, the welding lamp or the oxygen acetylene torch.