CFD Simulation Of An HVOF Process For The Optimization
Of WC-Co Protective Coatings
Author(s)
C. Bartuli, F. Cipri, T. Valente & N. Verdone
Abstract
CPD simulation of an HVOF process for the
optimization of WC-CO protective coatings
C. Bartuli, F. Cipri, T. Valente & N. Verdone
Department of Chemical and Materials Engineering
University '%a Sapienza", Rome, Italy
Abstract
Microstructured and nanostructured WC-Co composite coatings can be deposited
by HVOF starting from commercial composite powders. However, the reduction
in powder size of the ceramic reinforcement is responsible for a significant
increase of WC reactivity, enhancing the decarburation phenomena taking place
within the spraying torch, and potentially affecting the mechanical and
tribological properties of the deposited coatings. In order to limit the thermal
degradation of the reinforcement, it is therefore necessary to strictly control the
main combustion parameters of the torch, such as composition, velocity and
temperature of the combustion gases. Using a CFD code, thenno-chemical and
gas-dynamic properties of the gas flow within an HVOF JP-5000 (Hobart Tafa
Inc.) torch w
Keywords
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