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3715 |
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Thursday, May 22, 2014, Hall A 12:00 PM HVOF- / HVAF-Spraying |
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Influence of the handling parameters on the characteristics of HVOF-sprayed coatings processed by means of fine WC-12Co (2 - 10 µm) powders |
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Peter Hollingsworth* / Institute of Materials Engineering, TU Dortmund, Germany Wolfgang Tillmann / Institute of Materials Engineering, Technische Universität Dortmund, Germany Ingor Baumann/ Institute of Materials Engineering, Technische Universität Dortmund, Germany Markus Dildrop/ Institute of Materials Engineering, Technische Universität Dortmund, Germany Arne Eilers/ Institute of Materials Engineering, Technische Universität Dortmund, Germany |
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In order to apply near net shape coatings on parts with complex geometry it is crucial to be aware of the various interrelationships between the handling parameters of the spray process and the coating properties. In this study the influence of the handling parameters (spray angle, spray distance, track pitch, and gun velocity) on the deposition rate, the temperature development of the parts as well as the HVOF-sprayed coating properties (microhardness, roughness and porosity) derived from a fine agglomerated and sintered WC-12Co powder (2-10 µm) is investigated. It was found, that alterations of these handling parameters have significant effects on the constitution of the coatings, which are discussed within this study. |