Journal Article

PreJuSER-19833

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Diffusion and Phase Transformation at the Interface between an Austenitic Substrate and a Thermally Sprayed Coating of Ledeburitic Cold-Work Tool Steel

Röttger, A.FZJ* ; Weber, S.FZJ* ; Theisen, W.FZJ* ; Rajasekeran, B.FZJ* ; Vaßen, R.FZJ*

2011
Wiley-VCH-Verl. Weinheim

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Please use a persistent id in citations: doi:10.1002/srin.201000199

Abstract: An overlay coating against wear or corrosion on components is required for various technical applications. Thermal spraying is a well-established and near-net-shape deposition method. In this work, high-velocity oxy-fuel spraying of two different ledeburitic cold-work tool steels was employed to produce wear-resistant Fe-base coatings on a stainless steel substrate. This work focuses on the investigation of diffusion processes across the coating/substrate interface. Specimens were heat-treated for different dwell times and then analyzed by means of EBSD, XRD, OM, as well as SEM. Results of phase formation and diffusion profiles were compared with equilibrium and diffusion calculations obtained with ThermoCALC (R) and DICTRA (R). The influence of diffusion processes across the coating/substrate interface on the mechanical properties, such as adhesive bond strength and hardness, was investigated by shear tests and microhardness profiles.

Keyword(s): J ; thermal spraying (auto) ; diffusion (auto) ; heat treatment (auto) ; bond strength (auto) ; HVOF (auto) ; cold-work tool steel (auto)

Note: The authors gratefully acknowledge financial support by the Deutsche Forschungsgemeinschaft within the project "Thermisches Spritzen von verschleissbestandigen Fe-Basis MMC'' (DFG Project No.: TH531/6-1; VA163/4-1). Furthermore, L. Chmielak is gratefully acknowledged for experimental support.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellverfahren (IEK-1)

Research Program(s):

1. Rationelle Energieumwandlung (P12)

Appears in the scientific report 2011

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