This paper presents a new strategy for improving the quality of HVOF sprayed coatings as well as the deposition efficiency of the process. The highly turbulent expanding gas jet is stabilized and focused with the aid of a helical gas shroud. The effect of the design modification is demonstrated by numerical calculations and through the use of a prototype torch.

high-velocity oxyfuel spraying, numerical calculation, spray gun design, swirl-stabilized gas shroud, turbulent spray jet
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Copyright © 2009 ASM International. All rights reserved.
2009
ASM International
Topics
Thermal spray equipment High-velocity oxyfuel spray coating Process modeling and simulation Turbulent flow Fluid dynamic analysis
Issue Section:
High Velocity Oxyfuel and Air-Fuel Spraying Processes
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