Study of PVD AlCrN Coating for Reducing Carbide Cutting Tool Deterioration in the Machining of Titanium Alloys.
Study of PVD AlCrN Coating for Reducing Carbide Cutting Tool Deterioration in the Machining of Titanium Alloys.
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DOI：
10.3390/ma6062143
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发表时间：
2013-05-24
期刊：
影响因子：
--
通讯作者：
Di-Nardo S
中科院分区：
文献类型：
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作者：
Cadena NL;Cue-Sampedro R;Siller HR;Arizmendi-Morquecho AM;Rivera-Solorio CI;Di-Nardo S
由钛合金和其他难加工材料制成的医疗和航空零部件的制造需要同时开发高性能刀具，并在刀具上涂覆能够增强摩擦学和阻力性能的材料。本研究以AlCrN(铝铬氮化物)为原料制备了一种纳米复合薄膜，并对其沉积过程和表征进行了实验研究。分析了一种在钛合金加工中与其他涂层竞争的热处理单层涂层。利用扫描电子显微镜、能量色散X射线能谱(SEM-EDXS)和X射线衍射仪(X射线衍射仪)对制备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实验对涂层的力学性能进行了评价，量化了摩擦系数和磨损率。最后，进行了涂层碳化钨刀具的加工性试验，以确定涂层碳化钨刀具的耐磨性，这是高温下刀具在高端加工中的关键问题。结果表明，摩擦系数较小的试件在Ti6Al4V合金的加工性试验中具有更高的效率。此外，与传统的AlCrN单层涂层相比，热处理后的单层涂层具有更好的性能。
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.