Cadena Natalia L, Cue-Sampedro Rodrigo, Siller Héctor R, Arizmendi-Morquecho Ana M, Rivera-Solorio Carlos I, Di-Nardo Santiago
Tecnológico de Monterrey, Campus Monterrey, Eugenio Garza Sada 2501, Monterrey 64849, N.L., Mexico.
Centro de Investigación en Materiales Avanzados, S.C. Unidad Monterrey, 66600, Alianza Nte. 202, Apodaca, N.L., Mexico.
Materials (Basel). 2013 May 24;6(6):2143-2154. doi: 10.3390/ma6062143.
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.
由钛合金和其他难切削材料制成的医疗和航空航天部件的制造，需要同时开发涂覆有具有增强摩擦学和抗性性能材料的高性能切削刀具。在这方面，本研究对由AlCrN（铝铬氮化物）制成的纳米复合薄膜进行了研究，展示了沉积过程中的实验工作及其表征。分析了一种在钛合金加工中与其他涂层具有竞争力的热处理单层涂层。通过扫描电子显微镜和能量色散X射线光谱（SEM-EDXS）以及X射线衍射（XRD）对制造的涂层进行了不同的分析和表征。此外，通过硬度测试和销盘摩擦学评估涂层的力学行为，以量化摩擦系数和磨损率。最后，使用涂层硬质合金切削刀具进行了可加工性测试，以通过耐磨性确定其性能，这是高温高端切削中切削刀具的关键问题。结果表明，该试样（摩擦系数低于先前研究）在Ti6Al4V合金的可加工性测试中效率更高。此外，与传统的AlCrN单层涂层相比，热处理单层涂层表现出更好的性能。
