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Proceedings Paper

Application of near infrared pyrometry for CW Nd:YAG laser welding of stainless steel and laser cladding of stellite
Author(s): Ph. Bertrand; Igor Smurov; M. Ignatiev; Dominique Grevey
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Paper Abstract

A bi-dimensional monochromatic and a 1-spot multiwavelengths pyrometers were applied for surface temperature monitoring in Nd:YAG continuous laser welding. The experiments were performed for stainless steel and titanium alloy applying variation of laser parameters: power, welding velocity, focalisation distance, shielding gas flow rate, presence of surface pollution, with fixed or variable gap and misalignment between the dissimilar plates. Surface temperature evolution along and perpendicular to the welding seam and full temperature image versus laser action parameters were measured with the help of the bi-dimensional pyrometer. The dynamics of temperature gradients, transient periods and steady-state temperature distributions are analysed. The same approach is applied for Nd:YAG laser cladding of stellite on steel substrate. A new type of CCD based optical diagnostic tool has been applied for monitoring the particle in flight size and velocity.

Paper Details

Date Published: 2 September 2003
PDF: 10 pages
Proc. SPIE 5121, Laser Processing of Advanced Materials and Laser Microtechnologies, (2 September 2003); doi: 10.1117/12.515623
Show Author Affiliations
Ph. Bertrand, Ecole Nationale d'Ingenieurs de Saint-Etienne (France)
Igor Smurov, Ecole Nationale d'Ingenieurs de Saint-Etienne (France)
M. Ignatiev, Ecole Nationale d'Ingenieurs de Saint-Etienne (France)
Dominique Grevey, Lab. Laser et Traitements des Materiaux (France)

Published in SPIE Proceedings Vol. 5121:
Laser Processing of Advanced Materials and Laser Microtechnologies
Friedrich H. Dausinger; Vitali I. Konov; Vladimir Yu. Baranov; Vladislav Ya. Panchenko, Editor(s)

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