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Article

Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings

1
Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, D-09107 Chemnitz, Germany
2
Professorship Micromanufacturing Technology, Institute for Machine Tools and Production Processes, Chemnitz University of Technology, D-09107 Chemnitz, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Tomasz Chmielewski
Appl. Sci. 2021, 11(14), 6520; https://doi.org/10.3390/app11146520
Received: 1 June 2021 / Revised: 9 July 2021 / Accepted: 11 July 2021 / Published: 15 July 2021
(This article belongs to the Special Issue Advances in Surface Modification of the Materials)
Structural features of thermal spray coatings, e.g., porosity, can be beneficial as oil retention volumes in tribological systems in order to improve emergency running properties. While thermal spray coatings can already have a considerable degree of porosity depending on the coating conditions, the finish machining, e.g., by turning, has a significant influence on the final surface properties. Effects like near-surface deformation and subsequent closing of pores during the machining process should be prevented. In the present study, the influence of thermochemical surface hardening on the surface topography of wire arc sprayed 17Cr steel layers after finish turning was investigated. Successful surface hardening by gas nitriding was shown by light microscopic and phase analyses. The surface properties after the various treatment steps were characterized by the surface roughness parameters Ra and Rz, the valley void volume Vvv, and the Abbott curves. A rise of the valley void volume can be beneficial in tribological applications in which a suitable oil retention volume is required. Accordingly, a thermochemical treatment combined with an appropriate subsequent finishing process is suitable to significantly influence the surface properties of thermal spray steel coatings. View Full-Text
Keywords: 17Cr steel; gas nitriding; machining; surface properties; valley void volume; wire arc spraying 17Cr steel; gas nitriding; machining; surface properties; valley void volume; wire arc spraying
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MDPI and ACS Style

Kutschmann, P.; Lindner, T.; Liborius, H.; Grund, T.; Schubert, A.; Lampke, T. Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings. Appl. Sci. 2021, 11, 6520. https://doi.org/10.3390/app11146520

AMA Style

Kutschmann P, Lindner T, Liborius H, Grund T, Schubert A, Lampke T. Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings. Applied Sciences. 2021; 11(14):6520. https://doi.org/10.3390/app11146520

Chicago/Turabian Style

Kutschmann, Pia, Thomas Lindner, Hendrik Liborius, Thomas Grund, Andreas Schubert, and Thomas Lampke. 2021. "Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings" Applied Sciences 11, no. 14: 6520. https://doi.org/10.3390/app11146520

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