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Fräsbearbeitung thermisch gespritzter Hartmetallschichten

By L.-M. Berger, J. Spatzier, C. Hochmut and R. Georgi


This work describes the development of finishing solutions by milling for HVOF-sprayed WC-17Co and WC-(W,Cr)2C-7Ni coatings. The properties of oxidation resistance, microstructure, hardness, Youngs modulus and fracture toughness differ considerably between the two coating compositions. Polycrystalline diamond (PCD) cutting tools proved to be the most favourable for milling. The parameters could be optimised to achieve cost-efficient milling of the WC-17Co coatings with an appropriate PCD cutting tool grade. In the case of the WC-(W,Cr)2C-Ni composition a significantly lower machining tool lifetime was reached due to the differences in the properties of the two hardmetal coating compositions

Year: 2012
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Provided by: Fraunhofer-ePrints
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