Natalia L. Cadena 1, Rodrigo Cue-Sampedro 1, Héctor R. Siller 1,*,
Ana M. Arizmendi-Morquecho 2, Carlos I. Rivera-Solorio 1 和 Santiago Di-Nardo 1
1蒙特雷校區Eugenio Garza Sada 2501，蒙特雷64849，N.L.，墨西哥; 電子郵件：[email protected]（N.L.C.）; [email protected]（R.C.-S.）; [email protected]（C.I.R.-S.）; [email protected]（S.D.-N.）
2 中心de Investigación en Materiales Avanzados, 南卡羅來納州危地馬拉蒙特雷, 66600, Alianza Nte. 202, Apodaca, 約束, 墨西哥;電子郵件: [email protected] [email protected] mx
摘要: 由鈦合金制造的醫療和航空零部件和其他難以切割的材料需要開發高性能的刀具, 涂層材料能夠增強摩擦學和電阻特性。本文對 AlCrN (aluminum–chromium–nitride) 制備的薄層納米復合膜進行了研究, 并對沉積過程及其表征進行了實驗研究。分析了熱處理的單層涂層與其他涂層在鈦合金加工中的競爭。用掃描電鏡和能量色散 X 射線光譜 (SEM-EDXS) 和 x 射線衍射 (XRD) 對制備的涂層進行了不同的分析和表征。通過硬度試驗和摩擦學方法對涂層的力學性能進行了評價, 以量化摩擦系數和磨損率。最后, 采用涂層硬質合金刀具進行切削加工試驗, 通過耐磨性來確定其性能, 這是高溫下高檔切削刀具的關鍵問題。結果表明, 試樣 (摩擦系數比以往研究更低) 在 Ti6Al4V 合金的切削加工試驗中更有效。此外, 熱處理單層涂層比傳統的 AlCrN 涂層具有更好的性能.
關鍵字: AlCrN 膠片;PVD 沉積;刀具壽命;耐磨性;摩擦系數
Abstract: 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.
Materials 2013, 6 2144
Keywords: AlCrN films; PVD deposition; cutting tool life; wear resistance; friction coefficient