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Proceedings Paper

CO2 and Nd:YAG laser cladding using Stellite 6
Author(s): Anssi Jansson; John C. Ion; Veli Kujanpaeae
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Paper Abstract

Cladding of an austenitic stainless steel with the cobalt-based alloy Stellite 6, a trademark of Deloro Co, has been investigated by using both CO2 and Nd:YAG laser beams. This material is used for hardfacing in a number of industries, notably power generation and heavy engineering. Alloy powder was fed into the laser beam by using argon as a carrier gas. Clads were produced with a range of processing parameters, and sectioned for metallographic examination. Hardness values measured in the clads increased to a maximum with an increase in powder feed rate. This correlated with a decrease in the dendrite arm spacing observed in the micrographs. Abrasive wear testing also indicated that a finer microstructure resulted in improved properties. The Nd:YAG laser beam was found to be more efficient for melting the powder because it is absorbed to a greater extent than the CO2 laser beam. Cladding procedures were developed for both types of laser, and it is shown that in order to maximize in-service performance, the energy input of the process should be minimized.

Paper Details

Date Published: 3 March 2003
PDF: 6 pages
Proc. SPIE 4831, First International Symposium on High-Power Laser Macroprocessing, (3 March 2003);
Show Author Affiliations
Anssi Jansson, VTT Technical Research Ctr. (Finland)
John C. Ion, CSIRO Manufacturing Science and Technology (Australia)
Veli Kujanpaeae, VTT Technical Research Ctr. (Finland)

Published in SPIE Proceedings Vol. 4831:
First International Symposium on High-Power Laser Macroprocessing
Isamu Miyamoto; Kojiro F. Kobayashi; Koji Sugioka; Reinhart Poprawe; Henry Helvajian, Editor(s)

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