Characterisation of laser modified WC-CoCr coatings

All of RECERCAT

To access the full text documents, please follow this link: http://hdl.handle.net/2117/14082

Title:	Characterisation of laser modified WC-CoCr coatings
Author:	Chikarakaraa, Evans; Punset Fuste, Miquel; Picas Barrachina, Josep Anton; Brabazon, Dermot; Naher, S.
Other authors:	Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CDAL - Centre de Disseny d'Aliatges Lleugers i Tractaments de Superfície
Abstract:	In this work the affects of laser characteristics on surface morphology, microstructure, microhardness and wear rates of high velocity oxygen fuel (HVOF) WC–CoCr coatings were investigated. Continuous and pulsed laser treatments were applied on the HVOF coatings using a CO2 laser of 10.6 μm wavelength. Continuous laser treatment significantly improved homogeneity of the coatings. Pulsed laser treatment produced significantly higher discontinuities compared to continuous mode. Microhardness increased by 45% for continuous mode laser modified WC-CoCr coatings. However, wear resistance deteriorated, with a notable 40% increase in wear rate. The variations in coating properties were attributed to the re-melting and rapid quenching of the CoCr bonding matrix allowing for WC redistribution.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria dels materials::Metal·lúrgia -Tribology -CO2 laser surface modification -HVOF -Tribologia
Rights:
Document type:	Article - Published version Conference Object
Published by:	American Institute of Physics (AIP)
Share: