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Laser Beam Welding

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Laser Beam Welding is a technique in manufacturing whereby two or more pieces of material (usually metal) are joined by together through use of a laser beam.

The laser beam is a coherent (single phase) light of a single wavelength (monochromatic). The laser beam has low beam divergence and high energy content and thus will create heat when is strikes a surface.

Lasers are utilized in metalworking for:

Laser Types

There are two primary types of lasers used in welding and cutting:

CO2 lasers use a mixture of high purity carbon dioxide with helium and nitrogen as the lasing medium. Here are some of the key characteristics for CO2 lasers: Infrared (10.6 micro-meters); Beam transmission by mirror only (not fiber optic); Cutting lasers are typically from 0.5 to 2 kw; Difficulties in cutting/welding reflective materials (e.g., Aluminum or copper); Can cut non-metallic materials; High cutting speed possible.

Nd:YAG lasers use a solid bar of yttrium aluminum garnet doped with neodymium as the lasing medium. Here are some of the key charateristics for Nd:YAG lasers:

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Welding Encyclopedia


1 History of Welding

2 Arc Welding processes

2.2 Gas welding

2.3 Resistance welding

3 Welding costs

4 Safety issues