Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings
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...
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MDPI AG
2021-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/14/6520 |
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| author | Pia Kutschmann Thomas Lindner Hendrik Liborius Thomas Grund Andreas Schubert Thomas Lampke |
| author_facet | Pia Kutschmann Thomas Lindner Hendrik Liborius Thomas Grund Andreas Schubert Thomas Lampke |
| author_sort | Pia Kutschmann |
| collection | DOAJ |
| description | 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 <i>Ra</i> and <i>Rz</i>, the valley void volume <i>Vvv,</i> 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. |
| first_indexed | 2024-03-10T09:45:35Z |
| format | Article |
| id | doaj.art-04ee96786d534f6d8416d03577f26574 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T09:45:35Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-04ee96786d534f6d8416d03577f265742023-11-22T03:11:05ZengMDPI AGApplied Sciences2076-34172021-07-011114652010.3390/app11146520Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel CoatingsPia Kutschmann0Thomas Lindner1Hendrik Liborius2Thomas Grund3Andreas Schubert4Thomas Lampke5Materials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, D-09107 Chemnitz, GermanyMaterials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, D-09107 Chemnitz, GermanyProfessorship Micromanufacturing Technology, Institute for Machine Tools and Production Processes, Chemnitz University of Technology, D-09107 Chemnitz, GermanyMaterials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, D-09107 Chemnitz, GermanyProfessorship Micromanufacturing Technology, Institute for Machine Tools and Production Processes, Chemnitz University of Technology, D-09107 Chemnitz, GermanyMaterials and Surface Engineering Group, Institute of Materials Science and Engineering, Chemnitz University of Technology, D-09107 Chemnitz, GermanyStructural 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 <i>Ra</i> and <i>Rz</i>, the valley void volume <i>Vvv,</i> 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.https://www.mdpi.com/2076-3417/11/14/652017Cr steelgas nitridingmachiningsurface propertiesvalley void volumewire arc spraying |
| spellingShingle | Pia Kutschmann Thomas Lindner Hendrik Liborius Thomas Grund Andreas Schubert Thomas Lampke Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings Applied Sciences 17Cr steel gas nitriding machining surface properties valley void volume wire arc spraying |
| title | Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings |
| title_full | Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings |
| title_fullStr | Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings |
| title_full_unstemmed | Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings |
| title_short | Influence of Thermochemical Treatment on the Surface Properties of Finish Turned Wire Arc Sprayed 17Cr Steel Coatings |
| title_sort | influence of thermochemical treatment on the surface properties of finish turned wire arc sprayed 17cr steel coatings |
| topic | 17Cr steel gas nitriding machining surface properties valley void volume wire arc spraying |
| url | https://www.mdpi.com/2076-3417/11/14/6520 |
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