Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 214, Issue 2, Pages 456-461Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2013.09.029
Keywords
HVOF; Diagnostic; Methane; Cermet; Carbide
Funding
- Scientific Research Foundation of Jimei University
- Project of Technology Foundation for Selected Overseas Chinese Scholar (Ministry of Personnel of China)
- Fundamental Research Funds for the Central Universities [2011QN015]
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Commercially available WC10Co4Cr powder was thermally sprayed by HVOF process. The methane was used as the fuel gas and its flow rate was successively changed as well as the oxygen. The investigation was carried out to determine the influence of operating parameters on the evolution of velocity and temperature of in-flight particles in order to have a better understanding of the interaction between the particle and the flame jet. In relation to the particle characteristics, properties of the sprayed coatings were examined in terms of microstructure, porosity level and microhardness. The results show that the particle velocity and temperature depends strongly on the particle size. The variation of the methane flow rate has a more obvious influence on the velocity and temperature of particles than that of the oxygen. The changes of porosity and microhardness of deposited coatings are discussed corresponding to the variation of fuel and oxygen flow rates. (C) 2013 Elsevier B.V. All rights reserved.
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