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

Fabrice Meriaudeau; Anne-Claire Legrand; Frederic Truchetet

doi:10.1117/12.397938

31 August 2000 Laser-cladding powder spray distribution using a laser sheet illumination and a CCD camera

Fabrice Meriaudeau, Anne-Claire Legrand, Frederic Truchetet

Proceedings Volume 4076, Optical Diagnostics for Industrial Applications; (2000) https://doi.org/10.1117/12.397938
Event: Symposium on Applied Photonics, 2000, Glasgow, United Kingdom

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.

Citation Download Citation

Fabrice Meriaudeau, Anne-Claire Legrand, and Frederic Truchetet "Laser-cladding powder spray distribution using a laser sheet illumination and a CCD camera", Proc. SPIE 4076, Optical Diagnostics for Industrial Applications, (31 August 2000); https://doi.org/10.1117/12.397938

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