Laser Welding
Aluminium
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The advent of higher laser powers, improved beam focusing systems and better beam quality has led to power densities sufficient to overcome the high surface reflectivity of aluminium. Some alloys are prone to cracking, but
optimisation of the welding conditions and use of filler wire can eliminate this problem. Wire feed is also used for improving weld metal properties and tolerance to joint fit-up.
Porosity can also occur when laser welding aluminium, predominantly due to hydrogen entrapment in the molten pool. However, this can be minimised by correct cleaning and adequate shielding during welding. |
Applications for AluminiumCurrent and future industrial applications of aluminium laser welding includes fast ferries (catamarans), aluminium car components (e.g. Audi A2) and airframe structures. |
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Benefits of Laser Welding
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Typical Parameters
| Thickness
mm |
CO 2 laser | Solid state laser | ||
|---|---|---|---|---|
| Power
kW |
Speed
m/min |
Power
kW |
Speed
m/min |
|
| 2 | 5 | 6 | 2 | 1 |
| 2 | 4 | 6 | ||
| 6 | 5 | 1 | 4 | 1.0 |
Contact:
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Laser and Sheet Processes Group
TWI Ltd Granta Park Gt Abington Cambridge, CB21 6AL (previously CB1 6AL), UK |
email: lasers@twi.co.uk Tel: 01223 899000 Fax: 01223 890661 |
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