A Comparative Study of Wear and Oxidation Behaviors of End Mill Coated by PVD Coatings

Abstract:

The objective of this research is to study wear behaviors of TiN, nanolaminated AlCrN and nanocomposite TiAlSiN coated on cemented carbide end mill deposited by cathodic arc physical vapor deposition methods in comparison with uncoated end mill. Wear behaviors were investigated by nanoindentation hardness test, scratch test and cutting test. Oxidation test was also done in air at temperatures of 700°- 900°C in order to evaluate resistance of oxidation. In the nanoindentation hardness and scratch tests, nanocomposite TiAlSiN coating exhibited higher hardness than TiN and nanolaminated AlCrN coatings. The nanolaminated AlCrN coating represented the highest adhesion ability in terms of critical load and the lowest coefficient of friction in comparison with the TiAlSiN and TiN coatings, respectively. The cutting performance, represented in terms of maximum flank wear as a function of cutting length, was found to be highest in the AlCrN coating. Oxides of these coatings, i.e., TiO₂ for TiN, TiO₂ for TiAlSiN and Cr₂O₃ for AlCrN, generated at different temperatures of 700°, 800° and 900°C, respectively. From all of results, it is obvious that the AlCrN coating exhibited more excellent wear resistance and oxidation resistance than the uncoated end mill, TiN coating and TiAlSiN coating.

• Periodical: Advanced Materials Research (Volumes 785-786)
• Pages: 858-863
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.785-786.858
• Online since: September 2013
• Authors: Jadesada Rujisomnapa, Surasak Surinphong, Pornwasa Wongpanya
• Keywords: AlCrN, Friction and Wear, Maximum Flank Wear, Oxidation, TiAlSiN, TiN

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