Simulation and application of a HVOF process for MCrAIY thermal spraying |
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| Authors: | Young-myung Yang Hanlin Liao Christian Coddet |
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| Affiliation: | (1) R&D Center, Korea Gas Corporation, 638-1, Il-dong, Ansan, Kyunggi-do, South Korea;(2) Laboratoire d’Etudes et de Recherches sur les Matériaux et les Propriétés de Surface (LERMPS), Université de Technologie de Belfort-Montbéliard, 90010 Belfort Cedex, France |
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| Abstract: | This work deals with numerical simulation and application of a high velocity oxygen fuel (HVOF) process for MCrAlY thermal
spraying. The main objective of this study was to observe the correlations between coating oxidation and oxygen content in
combustion products or flame temperature. Spray parameters were selected on the basis of the numerical simulation of combustion
and particle behavior in the flame. The results of experiments revealed that the oxygen content is not the main key factor
concerning the oxidation rate of MCrAlY coatings. On the contrary, the flame temperature has a decisive influence on oxidation.
Combustion conditions corresponding to stoichiometric factors between 0.82 and 1.2 appeared not to be favorable for MCrAlY
thermal spraying. Outside this range, it appeared preferable to use a combustion system on the fuel-rich side. |
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| Keywords: | coating combustion flame temperature HVOF process MCrAlY oxide |
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