|About this Abstract
||2nd International Conference on Technological Innovations in Metals Engineering (TIME)
||Technological Innovations in Metals Engineering (TIME)
||Machining of Fe17Cr2Ni0.2C Thermally Sprayed Iron Based Coatings by Turning
||Hendrik Liborius, Andreas Nestler, Andreas Schubert, Gerd Paczkowski, Thomas Grund, Thomas Lampke
|On-Site Speaker (Planned)
Combustion engine blocks consisting of aluminium alloys exhibit thermally sprayed coatings as cylinder linings. These coatings are currently finish-machined by honing. A substitution by finish boring would lead to less environmental pollution and maybe reduced machining time.
In this work, machining by turning is investigated. The substrates are pre-machined to generate a helical dovetail microstructure at their surface. Subsequently, a bond layer and a Fe17Cr2Ni0.2C thermally sprayed coating are applied. Finish turning is carried out using CBN-tipped tools. The influences of different cutting parameters and tool geometries are analysed. The geometrical, physical, and tribological properties of the machined surfaces are evaluated.
The dovetail microstructures ensure a sufficient bonding between substrates and coatings for turning. Surface properties and respective tribological behaviour of the coatings can be significantly influenced by the finish machining conditions. The results show the potential of the coatings machined by turning to be used as cylinder linings.