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首页> 美国卫生研究院文献>Materials >Study of PVD AlCrN Coating for Reducing Carbide Cutting Tool Deterioration in the Machining of Titanium Alloys
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Study of PVD AlCrN Coating for Reducing Carbide Cutting Tool Deterioration in the Machining of Titanium Alloys

机译：减少钛合金加工中硬质合金刀具退化的PVD AlCrN涂层的研究

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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.
机译：由钛合金和其他难以切削的材料制成的医疗和航空航天部件的制造需要并行开发高性能切削工具，该切削工具涂有能够增强摩擦学和抵抗性能的材料。在此问题上，本研究研究了由AlCrN（铝-铬-氮化物）制成的纳米复合薄膜，显示了沉积过程的实验工作及其表征。分析了热处理后的单层涂层，该涂层在加工钛合金时可与其他涂层竞争。通过扫描电子显微镜和能量色散X射线光谱仪（SEM-EDXS）和X射线衍射（XRD）对制成的涂层进行了不同的分析和表征。此外，通过硬度测试和销钉盘摩擦学评估了涂层的机械性能，以量化摩擦系数和磨损率。最后，使用涂层的碳化钨切削刀具进行了可加工性测试，以通过耐磨性确定其性能，这是高温下高端切削中切削刀具的关键问题。结果表明，该样品（具有比以前的研究更低的摩擦系数）在Ti6Al4V合金的切削性能测试中效率更高。此外，与常规的单层AlCrN涂层相比，热处理的单层涂层表现出更好的性能。

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