Tribological Performance of Laser Patterned Cemented Tungsten Carbide Parts
| Autor: | T. Herrmann, Frank Mücklich, Fernando García Marro, Carsten Gachot, Andreas Rosenkranz, Dirk Bähre, Shiqi Fang, Luis Llanes |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica, Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials, Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Fiabilitat i Micromecànica dels Materials |
| Rok vydání: | 2016 |
| Předmět: |
0209 industrial biotechnology
Toughness Materials science Tribology Abrasive Machining Processes Honing 02 engineering and technology Enginyeria dels materials [Àrees temàtiques de la UPC] chemistry.chemical_compound 020901 industrial engineering & automation 0203 mechanical engineering Abrasive machining Machining Laser Surface Patterning Tungsten carbide Carburs -- Propietats mecàniques Lubricant General Environmental Science Surface Integrity Metallurgy 020303 mechanical engineering & transports chemistry Cemented Tungsten Carbid (WC-Co) General Earth and Planetary Sciences Carbides Surface integrity |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| ISSN: | 2212-8271 |
| DOI: | 10.1016/j.procir.2016.02.228 |
| Popis: | Some tools for machining processes used to be guided by supporting parts while using them for cutting or abrasive machining. For instance, the guide stone is used as supporting part in the honing process, which maintains the concentricity of the rotating axis. The contact surfaces of the supporting parts should exhibit the following properties: adequate combination of hardness, toughness and wear resistance. The damage of contact surfaces can be caused by a combination of friction and adhesion, related to the weakness of surface conditions in the tribological system, e.g. asperities, debris and pores. In order to investigate the impact of the surface topography, contact surfaces of the supporting parts made of cemented tungsten carbide (WC-Co) have been treated by means of laser surface patterning (LSP). Two different surface patterns with deterministic geometries on the micro and nano scale are achieved by two distinct LSP methods: line-like patterns by Laser-Interference Metallurgy (LIMET) with ns-laser and dimples by ps-laser. Tangential force coefficients, similar to the coefficient of friction (COF) in the non-abrasive case, are measured to evaluate the impact of the surface patterns. In this paper, the LSP methods as well as the analysis of the resulting surface topography are introduced. It is found that higher friction is obtained by line-like patterns whereas dimples can efficiently reduce the friction. At low load, hydrodynamic effects are reinforced as the dimples work as lubricant reservoirs and trap wear particles, and the observation becomes less obvious at high load. Meanwhile, only slight friction augmentation is observed by line-like patterns when the load increases. |
| Databáze: | OpenAIRE |
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