To weld aluminum, you must know the best welding techniques and adhere to the post-welding process. Because it isn’t the same as steel, it requires some aluminum-specific welding. You should also be aware of some difficulties that may arise.
It’s a good idea to do some research before you start welding. This will help you to be prepared, especially if it’s your first time. You can look into this article as a recommended reading that’d be a blueprint for you.
Materials Needed To Weld Aluminum
Some specific items may be required when welding aluminum. Because it has a different column than steel, it’d require a different welding machine. There are various types of aluminum, so before selecting your welding materials, you must first determine which type of aluminum you intend to weld.
Before starting, a wire brush and chemicals are used to clean the area. Filler is required for push-pull guns, and the proper welding process must be chosen.
Welding Techniques For Aluminum
Various types of techniques are appropriate for welding aluminum. Select one based on the aluminum you want to weld:
- Gas Tungsten Arc Welding (GTAW) Or Tungsten Inert Gas (TIG)
This type doesn’t require feeding because the filler material is fed by the welder, and it’s also a clean process. This one is also the simplest.
- Gas Metal Arc Welding (GMAW) Or Metal Inert Gas (MIG)
This is another good option because it has high deposition rates and it travels quickly. GMAW necessitates the use of a mechanical feeding system. Aluminum wire can be fed using a push-pull gun.
- Laser Beam Welding And Electron Beam Welding
They can weld aluminum well and fast. Both also have a relatively lower temperature.
- Resistance Welding
This is another option to consider when welding aluminum, but it has several drawbacks due to the thermal and electrical conductivity of aluminum.
Welding Safety
Welding requires a high level of safety in all aspects. Anything flammable or potentially harmful to you must be kept out of your working area. Wearing protective clothing is advised such as a helmet with face shielding and goggles or some shading on the glass area.
Always wear glasses, gloves, and safety shoes when welding. A fire extinguisher should also be nearby. And in case of emergency, don’t hesitate to seek help from the people near you.
Welding Techniques
Welding aluminum necessitates specialized skills and knowledge. You must first prepare and clean your materials. Examine your equipment to ensure that everything is in working order and the proper position. Clear your workspace and wear protective equipment for your safety.
It’s always a good idea to set the selector switch to A/C. The torch’s connection must be tightened. Open the valve on your gas bottle and adjust the flow rate to your liking. It’s also good to practice before you start to weld.
Because of its superior durability and purity, pure tungsten should be used for your TIG electrode. Sharpening the electrode isn’t recommended because the alternating current could break it off, causing the tip to fall in your weld.
Oxidation, impurities, porousness, and thickness are all the things you need to keep an eye out for. Thermal conductivity and filler metal should also be considered.
Cleaning Aluminum
Cleaning is critical when welding aluminum, so make sure you know how to do it correctly. You’ll need acetone and a stainless-steel brush to clean the surface and remove the aluminum oxide. Allow your aluminum to dry for eight hours before welding. Cleaning the oxide layer results in a strong weld.
Challenges When Welding Aluminum
When welding aluminum, you may encounter some difficulties. If you don’t clean the surface before welding, it’ll cause problems in the long run. Using a long arc would also be difficult because it may cause the rod to melt before it reaches the area where it’s supposed to melt. Too much heat softens the joint, causing it to bend.
It’s difficult to start if you don’t know what kind of aluminum you want to weld. It’s also best to seek help from a more knowledgeable person to show you how to weld aluminum properly without challenges.
Conclusion
Hopefully, this guide helps you remember the important steps and considerations when welding aluminum. You now know what processes to do if you want to weld aluminum. Take note of the challenges that you should be prepared for. Also, choosing the right type of welding for your aluminum would make the work easier for you. Consider the ideas mentioned here as you plan and prepare for this project.
