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6347 |
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Cored wires with large diameter and adapted hard material filling for wire arc spraying |
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Ruben Winkler* / TU Chemnitz, Materials and Surface Engineering Group, Germany Ruben Winkler / Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, Germany Gerd Paczkowski/ Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, Germany David Kupke/ Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, Germany Thomas Lampke/ Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, Germany |
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One successful strategy to establish wear-resistant coatings is the embedment of carbide hard particles of a certain size and concentration in a ductile matrix. For that purpose the wire-arc spraying process under use of cored wires with a metallic shell and a particle-filled core is suitable. Especially, for wires with large diameters (>1.6 mm) the process has hardly been investigated yet. Due to the high kinetics of the arc and gas flow, there are considerable challenges in terms of reproducibility, homogeneity and material efficiency. An improved understanding of the process requires an investigation of the relationships between wire design, particle size and hard material transfer. The subject of the current study was a selection of cored wires with a nickel shell (diameter 2.4 mm) and tungsten carbide filling. Particles with small diameter (<100 ¼m) result in increased hard material content in the coating. |