Welding aluminium and its alloys is a complex task that requires specific techniques to ensure high-quality welds. TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding methods are commonly used to weld this material. Each method offers specific advantages depending on the application. Are you wondering how to TIG and MIG weld aluminium? Read our article to find out.
Basic Techniques for TIG Welding Aluminium
How to TIG and MIG weld aluminium First of all, it is important to know that TIG welding is valued for its precision and ability to produce clean, strong welds. This method uses a non-consumable tungsten electrode and an inert gas (usually argon) to protect the welding area from atmospheric contaminants. Therefore, to successfully TIG weld aluminium, it is first important to prepare the parts to be welded correctly.
The metal surface must be thoroughly cleaned to remove oxides and contaminants. Stainless steel brushes or specific solvents can be used for this purpose. Once this has been done, an alternating current (AC) must be used. This helps to break down the refractory oxide layer on the material to ensure a clean and effective weld. Next, the correct diameter of tungsten electrode must be selected.
Note that larger diameter electrodes are recommended for thicker parts, while thinner electrodes are suitable for precision welding on thin parts. All that remains is to set the welding parameters correctly. The cleaning balance and AC frequency must then be adjusted to optimise welding performance. To remove oxides, a higher cleaning balance is recommended. To obtain a more concentrated arc, a higher frequency will work better.
Practical Guide to MIG Welding Aluminium
MIG welding aluminium is ideal for jobs requiring fast and efficient welding over large areas. This method uses a consumable wire electrode and an inert gas to protect the weld. As before, the first thing to do is to prepare the parts. They must be cleaned thoroughly, in particular by removing oxides with a stainless steel brush designed for aluminium.
The correct shielding gas must then be used. Pure argon is the most commonly used gas for this purpose. For thicker welds, a mixture of argon and helium is recommended for better penetration. The next step is to choose the right welding wire. Wire alloys such as ER4043 or ER5356 are the most commonly used.
ER4043 offers better fluidity, while ER5356 is more resistant and recommended for parts requiring high mechanical strength. All that remains is to adjust the machine settings. The idea is to adjust the voltage, wire feed speed and gas flow rate according to the thickness of the aluminium and the type of weld to be made. To avoid melting and deformation problems, a constant wire feed speed is essential.
Metaconcept: Expert in TIG and MIG Aluminium Welding Solutions
Metaconcept offers a complete range of products and solutions for aluminium welding, whether for TIG or MIG techniques. Our expertise in brazing and consumables guarantees high-quality welds, suitable for all industrial applications. To find out more about our products and services, visit our page dedicated to TIG and MIG aluminium brazing.
In any case, if you are wondering how to TIG and MIG weld aluminium, keep in mind that careful preparation, the choice of the right materials and precise settings are essential for successful welding. With its expertise and high-quality products, Metaconcept is the partner of choice for all your welding operations.
Contact our team of experts for a free quote for your projects.