W. Tillmann, E. Vogli, Dortmund University, Dortmund, Germany
To use the manifold possibilities that the arc spraying offers to deposit carbide layers, the knowledge of the particle characteristics are necessary. The work is focused on understanding the particle formation during arc spraying with cored wires. The influence of primary and secondary atomisation gas on the particle formation as well as on the particle form, particle dimension and grain size are analysed. Melting behaviour of different cored wires under various spraying parameter are investigated. Correlation between coating properties and particle characteristics are established. Experimental approaches to determine the in-flight properties of the sprayed particles in combination with metallographic analyses are employed to establish these correlations.
Summary: To use the manifold possibilities that the arc spraying offers to deposit carbide layers, the knowledge of the particle characteristics are necessary.
The work is focused on understanding the particle formation during arc spraying with cored wires. The influence of primary and secondary atomisation gas on the particle formation as well as on the particle form, particle dimension and grain size are analysed. Melting behaviour of different cored wires under various spraying parameter are investigated. Correlation between coating properties and particle characteristics are established. Experimental approaches to determine the in-flight properties of the sprayed particles in combination with metallographic analyses are employed to establish these correlations.
