Influence of intensity distribution on the meltpool and clad shape for laser cladding


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Lange de, D.F. and Hofman, J.T. and Meijer, J. (2005) Influence of intensity distribution on the meltpool and clad shape for laser cladding. In: Third International WLT-conference on Lasers in Manufacturing, June 13th - 16th, 2005, Munich, Germany.

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Abstract:The influence of the optical system on the laser cladding process is studied, in particular with respect to the burn-in shape: the penetration of the meltpool into the substrate. The beam caustic and intensity profiles for the commonly used out-of-focus laser clad operation are presented and discussed. To avoid the disadvantages of the out-of-focus operation, a novel telezoom optical system is developed, which allows in-focus operation with a sufficiently large focus with a uniform intensity distribution and a spot diameter ranging from 3 up to over 6 mm. Different typical burn-in shapes are indicated, as they can be found in cross sections of experimental clads. The influence of the intensity distribution on the occurring burn-in shapes is discussed, as well as other phenomena that can play a role, such as flow recirculation cells in the meltpool.
Item Type:Conference or Workshop Item
Faculty:
Engineering Technology (CTW)
Link to this item:http://purl.utwente.nl/publications/52655
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