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Proceedings Paper

Laser-cladding powder spray distribution using a laser sheet illumination and a CCD camera
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Paper Abstract

In many industrial applications, the material surface is, most of the time, the preponderant factor in the life time of a piece. In such cases, it is relevant to be able to improve the superficial properties of the material. To do so, on solution: the laser cladding process, consists in deposing a hardfacing alloy where the constraints are more likely to occur. The process involves the delivery of fine grained alloy powder blown into the melt pool during the laser irradiation. In a coaxial delivery system, the powder spray distribution as well as the grain speed have a tremendous impact on the process efficienty. We herein present different experimental methods enabling to assess the particle speed as well as their distribution within the spray. Our configurations employ a laser sheet illumination of the power spray, a CCD camera and a PC to process the obtained images. In order to study the power distribution versus the nozzle distance, the laser sheet was moved away from the nozzle with low incremental steps such as to establish a profile of the spray. For speed measurements, various configurations were used. Images either manually processed or automatically using algorithms such as Hough, or Fourier Transform.

Paper Details

Date Published: 31 August 2000
PDF: 12 pages
Proc. SPIE 4076, Optical Diagnostics for Industrial Applications, (31 August 2000); doi: 10.1117/12.397938
Show Author Affiliations
Fabrice Meriaudeau, Univ. de Bourgogne (France)
Anne-Claire Legrand, Univ. de Bourgogne (France)
Frederic Truchetet, Univ. de Bourgogne (France)


Published in SPIE Proceedings Vol. 4076:
Optical Diagnostics for Industrial Applications
Neil A. Halliwell, Editor(s)

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