Study of PVD AlCrN Coating for Reducing Carbide Cutting Tool Deterioration in the Machining of Titanium Alloys

Materials

Natalia L. Cadena¹  Rodrigo Cue-Sampedro¹  Hຜtor R. Siller¹  Ana M. Arizmendi-Morquecho²  Carlos I. Rivera-Solorio¹ 

[1] Tecnológico de Monterrey, Campus Monterrey, Eugenio Garza Sada 2501, Monterrey 64849, N.L., Mexico; E-Mails:;Centro de Investigación en Materiales Avanzados, S.C. Unidad Monterrey, 66600, Alianza Nte. 202, Apodaca, N.L., Mexico; E-Mail:

关键词: AlCrN films;    PVD deposition;    cutting tool life;    wear resistance;    friction coefficient;   

DOI  :  10.3390/ma6062143

来源: mdpi

【 摘 要 】

The manufacture of medical and aerospace components made of titanium alloys and other difficult-to-cut materials requires the parallel development of high performance cutting tools coated with materials capable of enhanced tribological and resistance properties. In this matter, a thin nanocomposite film made out of AlCrN (aluminum–chromium–nitride) was studied in this research, showing experimental work in the deposition process and its characterization. A heat-treated monolayer coating, competitive with other coatings in the machining of titanium alloys, was analyzed. Different analysis and characterizations were performed on the manufactured coating by scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDXS), and X-ray diffraction (XRD). Furthermore, the mechanical behavior of the coating was evaluated through hardness test and tribology with pin-on-disk to quantify friction coefficient and wear rate. Finally, machinability tests using coated tungsten carbide cutting tools were executed in order to determine its performance through wear resistance, which is a key issue of cutting tools in high-end cutting at elevated temperatures. It was demonstrated that the specimen (with lower friction coefficient than previous research) is more efficient in machinability tests in Ti6Al4V alloys. Furthermore, the heat-treated monolayer coating presented better performance in comparison with a conventional monolayer of AlCrN coating.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.