Materials
Can you laser welding aluminium?
Quick answer
Yes — yes, with wire feed and care on reflectivity. Laser on aluminium: match technique to the material; filler ER4043.
The verdict and why
Yes, with wire feed and care on reflectivity. Oxide melts at ~2000°C while the metal underneath melts at ~660°C — cleaning and AC balance are everything
Watch-outs
- stainless brush the oxide layer off right before welding — it reforms within hours
- Prep: stainless brush the oxide layer off right before welding — it reforms within hours
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