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3701 |
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Friday, May 23, 2014, Hall H3 10:40 AM Pre- & Post-Treatment |
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Application of dry-ice blasting in high velocity oxy-fuel process for deposition of thick WC-Co coating |
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Shujuan Dong* / IRTES-LERMPS,Université de Technologie de Belfort-Montbéliard, FRANCE Bo Song/ IRTES-LERMPS, Université de Technologie de Belfort-Montbéliard, Site de Sévenans, 90010 Belfort Cedex, France, France Bernard Hansz/ HMRexpert, Impasse Bliss 25490 Fesches-le-Châtel, France, France Hanlin Liao/ IRTES-LERMPS, Université de Technologie de Belfort-Montbéliard, Site de Sévenans, 90010 Belfort Cedex, France, France Christian Coddet/ IRTES-LERMPS, Université de Technologie de Belfort-Montbéliard, Site de Sévenans, 90010 Belfort Cedex, France, France |
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The residual stresses arising during High Velocity Oxy-Fuel (HVOF) thermal-spraying process usually restrict the building up of thick coatings. In this work, dry-ice blasting was applied to HVOF process to deposit thick WC-Co coatings with high quality, since it has the potential of efficient cooling and mechanical peening, etc. Several techniques, including x-ray diffraction, scanning electron microscopy, and energy dispersive spectroscopy, were used to characterize the microstructures and phase distribution of the powders and coatings. In addition, mechanical properties such as hardness and sliding wear resistance were investigated. HVOF sprayed WCCo coating with dry-ice blasting is characterized by compact construction, grain refinement, high hardness as well as outstanding sliding wear resistance. |