Mostra el registre d'ítem simple
Surface modification of HVOF thermal sprayed WC-CoCr coatings by laser treatment
dc.contributor.author | Chikarakara, E. |
dc.contributor.author | Aqida, S. |
dc.contributor.author | Brabazon, D. |
dc.contributor.author | Naher, S. |
dc.contributor.author | Picas Barrachina, Josep Anton |
dc.contributor.author | Punset Fuste, Miquel |
dc.contributor.author | Forn Alonso, Antonio |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica |
dc.date.accessioned | 2010-06-07T17:45:38Z |
dc.date.available | 2010-06-07T17:45:38Z |
dc.date.created | 2010 |
dc.date.issued | 2010 |
dc.identifier.citation | Chikarakara, E. [et al.]. Surface modification of HVOF thermal sprayed WC-CoCr coatings by laser treatment. A: ESAFORM Conference on Material Forming. "13th International ESAFORM Conference on Material Forming". Brescia: Springer, 2010, p. 1-4. |
dc.identifier.uri | http://hdl.handle.net/2117/7557 |
dc.description.abstract | In this work the affects of laser characteristics on microstructure and microhardness of high velocity oxygen fuel sprayed (HVOF) WC–CoCr coatings were investigated. The coating was deposited with a Sulzer Metco WokaJet™-400 kerosene fuel and the laser surface treatments were applied using CO2 laser with 10.6 μm wavelength. Large variations in surface properties were produced from variation in the laser processing parameters. In total, four levels of peak power (100, 200, 300 and 350 W), four levels of spot diameter (0.2, 0.4, 0.6 and 1 mm) and three levels of pulse repetition frequency (PRF) were investigated. An initial set of tests were followed by a more detailed 33 factorial design of experiments. Pulse repetition frequency and duty cycle were set in order to maintain the same overlap in the x and y directions for the raster scanned sample spot impact dimensions. Overlaps of 30% were used in the initial tests and 10% in the more detailed trials. The results have shown that care must be taken to keep the irradiance at a relatively low level compared to uncoated surfaces. High irradiance can in this case result in rough and porous surfaces. Lower levels of irradiance are shown to provide more uniform microstructures, reduced porosity and increased microhardness. |
dc.format.extent | 4 p. |
dc.language.iso | eng |
dc.publisher | Springer |
dc.subject | Àrees temàtiques de la UPC::Enginyeria electrònica::Optoelectrònica::Làser |
dc.subject | Àrees temàtiques de la UPC::Física::Física de l'estat sòlid::Superfícies |
dc.subject.lcsh | Surface preparation |
dc.subject.other | Thermal spraying |
dc.subject.other | Laser surface hardening |
dc.subject.other | WC-CoCr |
dc.subject.other | Tooling |
dc.title | Surface modification of HVOF thermal sprayed WC-CoCr coatings by laser treatment |
dc.type | Conference report |
dc.subject.lemac | Superfícies -- Tractament |
dc.contributor.group | Universitat Politècnica de Catalunya. CDAL - Centre de Disseny d'Aliatges Lleugers i Tractaments de Superfície |
dc.description.peerreviewed | Peer Reviewed |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 2396987 |
dc.description.version | Postprint (published version) |
local.citation.author | Chikarakara, E.; Aqida, S.; Brabazon, D.; Naher, S.; Picas, J.A.; Punset, M.; Forn, A. |
local.citation.contributor | ESAFORM Conference on Material Forming |
local.citation.pubplace | Brescia |
local.citation.publicationName | 13th International ESAFORM Conference on Material Forming |
local.citation.startingPage | 1 |
local.citation.endingPage | 4 |