Abstract No.:

Adaption of the path strategy to produce near net shape coatings manufactured by HVOF spraying

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

Several factors influence the deposition rate of thermal spray processes. First of all the parameters of the thermal spray process itself (fuel flow, oxygen flow, etc.) crucially affect the deposition efficiency and rate. Additionally, changes in handling parameters such as the spray angle, the track pitch and the gun velocity, have an effect on the coating build up. In case of planar or large rotationally symmetric parts it is simple to keep these influencing parameters constant and with it the coating thickness. However, with increasing complexity of the parts, alterations of the handling parameters are not avoidable.
In this study the path strategy is adapted by means of a deposition simulation. This simulation based on the analysis of the footprint of the HVOF spray plume. Furthermore the dynamic movement behavior of the robot is considered and integrated into the path strategy adaption. As feedstock material a fine sintered and agglomerated WC-12Co powder (2-10 µm) was used.

<= go back