Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8028620 | Surface and Coatings Technology | 2013 | 7 Pages |
Abstract
The cutting material polycrystalline cubic boron nitride (PCBN) is ideally suited for machining of difficult-to-cut materials. It exhibits properties such as high hardness and high chemical stability at elevated temperatures. However, due to the occurrence of tribo-oxidation and abrasion during machining of hardened steels abrupt tool failure is common. The deposition of coatings offers a possibility to protect the PCBN substrate. Initial research results indicate that nanocomposite coated cutting tools show a significantly improved tool life and process behavior in hard machining. This paper describes the results of machining tests with uncoated and nc-AlTiN/a-Si3N4 and nc-AlCrN/a-Si3N4 nanocomposite coated PCBN tools with regard to the tool life and wear form. Additionally, the wear mechanisms abrasion and tribo-oxidation were investigated in model wear experiments. Furthermore, FEM cutting simulations were used to investigate the thermal interaction between substrate and coating.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
E. Uhlmann, J.A. Oyanedel Fuentes, R. Gerstenberger, H. Frank,