Flux cored welding uses a tubular consumable with a flux instead of a solid wire. As these consumable melts, the flux core reacts to generate a slag and gas shield. This welding process does not always require an external shielding gas. It is semi-automatic to fully automatic. Flux cored welding has high deposition rates and great penetration. It can be used outdoors or for less than perfect surface welds. These properties have made flux cored welding very popular in shipbuilding, constructing and heavy fabrication industries. As manufacturers put this process to the test, flux cored wires made from aluminium and their associated processes have answered the productivity demands of industries welding aluminium for construction of lighter vehicles.
Aluminium flux cored wire welding
Aluminium flux cored wire welding uses the same principle as standard flux cored welding of a tubular wire which contains flux, but a specific flux composition has been developed for aluminium. Additives such as silicon, manganese or titanium are taken into consideration depending upon the base aluminium series being welded to alter the flux cover to control the fluidity of the flux, minimize hot cracking and control the grain structure of the weld. Because it employs the same basic setup as conventional flux cored arc welding, including compatible wire feeders and power sources, it makes possible for fabricators to weld aluminium using equipment they already use for FCAW (Flux-Cored Arc Welding), thus expanding their productivity to include aluminium components.
Advantages of Aluminium Flux Cored Welding
- Flows Well and Curable Less: Silicon in aluminium flux cored wires flows well, decreases the tendency of forming hot cracks, and improves the consistency of weld beads.
- High Volume, Automated Welding: Consistent flux composition minimizes porosity and aids fast cycle times. This makes them suitable for high volume automated welding.
- Automotive and Building Component Welding: The strength and cleanness of joints of aluminium flux cored wire makes it suitable for automotive and building component applications.
- Welds Multiple Aluminium Series: Different flux compositions improve the strength of 3000 series aluminium alloys that can be found in kitchenware or decorative panels. Plus, grain refinement of 1000 series can be done by using titanium-based fillers.
- Fewer Needs for External Shielding: Like most flux cored welding, the internal flux reduces the tendency for constant flow of externally provided shielding gas(es), thus having more versatility for a wide range of fabrication conditions.
As fall under demand for more lightweight and stronger manufactured joints while retaining the same efficiencies, flux core aluminium welding is helping fulfil most of these needs. Infusing the productivity of flux cored arc welding with aluminium alloy-specific flux, this method helps fabricators deal with aluminium weld issues at scale, making it an essential component of any advanced welding wire.
