Getting the perfect solution to a challenging fabrication requires a severe amount of skill, creativity, and invention. At KP Fabrication & Welding, we have expertise in all three areas. We learn new techniques, and find out new ways to deal with everyday fabrication challenges.
However, in terms of aluminium fabrication, there are many challenges. Here are some tips and techniques for welding aluminium:
Aluminium Has a Rather Unstable Chemical Composition:
Unlike some metals, aluminium has a rather unstable chemical composition that can be easily broken up under stress. Often, during welding, the aluminium reacts to the filler metal, which can cause hot cracking, breaking, and too brittle metal, which is likely to break in the future.
To prevent this, we choose a filter metal that has a chemical composition with a lower sensitivity to the heat and cracking.
Aluminum Has a Low Melting Point:
One of the biggest challenges of aluminium welding is that it has a very low melting point. This is why aluminium is more likely to warp, crack, and break during welding.
To prevent this, use a GMAW process with pulsation capability. This kind of power source combines low background current and high peak current in a rotational capacity, so the metal doesn’t get so hot and burn-through can be prevented.
Aluminum Welding Can Cause Discoloration:
Another challenge of aluminium welding is the discolouration of aluminium after it’s been welded. This is caused by the magnesium oxides, or aluminium, collecting at the weld on the base material.
To prevent this, use the right filler metal, utilise the appropriate contact-to-work distance and hold the welding gun at the right angle. All of this sounds quite overwhelming and challenging. Don’t worry, we’ve got your back! At KP Fabrication & Welding, we can help you find solutions to your unique fabrication requests. Contact us now!