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Proceedings Paper

Influence of the base preheating on cracking of the laser-cladded coatings
Author(s): Rafal Jendrzejewski; Gerard Sliwinski; Ana Conde; Juan J. de Damborenea
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Paper Abstract

Coatings of stellite SF6 are prepared on the chromium steel base by means of a direct laser cladding. A 1.2 kW CO2 laser is applied and the original material is delivered into the processing zone coaxially with the laser beam. The samples are produced with and without a controlled preheating of the substrate and are investigated by means of metallographic techniques. It is found that the observed micro-cracking susceptibility decreases markedly with increase of the base preheating temperature up to 750 K and the crack-free coatings are produced for preheating around 950 K. The substrate-coating interface reveals a metallic bond and the microstructure is characterized by a fine-grained, dendritic structure. The nearly constant concentration dependence of Fe, Co, Cr and Ni on the distance from interface indicates on homogeneous chemical composition of the produced coatings.

Paper Details

Date Published: 2 September 2003
PDF: 6 pages
Proc. SPIE 5121, Laser Processing of Advanced Materials and Laser Microtechnologies, (2 September 2003); doi: 10.1117/12.515624
Show Author Affiliations
Rafal Jendrzejewski, Institute of Fluid-Flow Machinery (Poland)
Gerard Sliwinski, Institute of Fluid-Flow Machinery (Poland)
Ana Conde, Ctr. Nacional de Investigaciones Metalurgicas (Spain)
Juan J. de Damborenea, Ctr. Nacional de Investigaciones Metalurgicas (Spain)

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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