Technology and process
The hybrid welding process combines the advantages of laser welding and gas shielded arc welding. The laser beam creates a deep weld seam at a low heat input, while the welding wire fills the weld joint in gas shielded arc welding.
By using the hybrid welding process, the number of seams required for a joint can be reduced many times in comparison with conventional processes. In addition, distortion and welding stresses are avoided thanks to the low linear energy.
The main advantage over the laser welding process is the lower sensitivity in matching the elements, which leads to a significant reduction of costs for the preparation of materials to be welded. The use of electrode wire in the gas-shielded welding process makes it possible to influence the metallurgical properties of the joint by using a filler metal, perform fillet welds and weld beads.
The lower cooling rate compared to laser welding results in lower hardness of the welds. Welds produced with the hybrid welding process are of high quality; the illustration above shows a cross-section of welds produced with the respective processes.
Selected materials that we weld by hybrid welding
Hybrid welding is mainly used for butt welding of metalsheets with thickness from 2 to 16 mm (for larger thicknesses in several passes), welding of pipes and fillet welds (in several passes) for a wide range of materials:
- Alloyed and high-alloy steels,
- Aluminum and its alloys,
- NiCr alloys.
Why it is worth to choose hybrid welding?
- Deep weld penetration - the hybrid welding process achieves a result in a single pass that would normally require multi-layer arc welding processes
- High process efficiency - high-power lasers can weld steel up to 20 mm thick in a single pass
- Increased tolerance for edge preparation of joined parts
- No or significantly reduced need for chamfering the edges of joined parts
- The laser beam enables deep and narrow welds with low linear energy, significantly reducing the distortion and welding stresses that occur with conventional methods
- High welding speeds
- Increased stability of the welding process
- Possibility of robotization and automation
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