TA19钛合金TiAlN薄膜的摩擦磨损特性研究
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摘要
为了提高钬合金的耐磨性能,采用磁控溅射技术在TA19钛合金表面制备了TiAIN硬质薄膜。采用扫描电镜、能谱仪和X射线衍射分析了薄膜的表面和截面形貌,成分分布以及相结构。分别以5 m/min、10 m/min及20 m/min的滑动速度对未制备和制备了TiAlN薄膜的TA19合金进行了球-盘磨损试验,以揭示其摩擦磨损特性。结果表明:TiAlN薄膜表面均匀、无孔洞,厚度约3.6μm;平均显微硬度达1 208.2 HV0.1,比TA19合金提高了近3倍;滑动速度不同,TiAlN薄膜的摩擦因数、磨损速度和比磨损率均小于TA19合金;随着滑动速度的提高,TiAlN薄膜的磨损机制由轻微的磨粒磨损转化为磨损量较大的磨粒磨损和氧化磨损。
In order to improve wear resistance of TA19 titanium alloy, a type of hard TiAIN film was prepared on it by magnetically controlled sputtering technology. The TiAIN film was tested for morphologies of surface and crosssection, composition distribution and phase structure by means of scanning electron microscope, energy dispersive spectrometer and X-ray diffraction. Ball-disk wear tests for the TA19 alloy without and with TiAIN film were performed at sliding speeds of 5, 10, and 20 m/min, respectively. The results showed that the TiAIN film offered uniform and pore-free surface, thickness of about 3. 6 μm, and gave average microhardness as high as 1 208. 2 HV0. 1 which was nearly three times higher than that of the TA19 alloy without TiAIN film. Friction coefficient,wear rate and specific wear rate of the TiAlN film all were less than those of the TA19 alloy regardless of the sliding speeds. As the sliding speed increased, wear mechanism of the TiAIN film converted from slight abrasive wear to heavy abrasive wear and oxidative wear.
In order to improve wear resistance of TA19 titanium alloy, a type of hard TiAIN film was prepared on it by magnetically controlled sputtering technology. The TiAIN film was tested for morphologies of surface and crosssection, composition distribution and phase structure by means of scanning electron microscope, energy dispersive spectrometer and X-ray diffraction. Ball-disk wear tests for the TA19 alloy without and with TiAIN film were performed at sliding speeds of 5, 10, and 20 m/min, respectively. The results showed that the TiAIN film offered uniform and pore-free surface, thickness of about 3. 6 μm, and gave average microhardness as high as 1 208. 2 HV0. 1 which was nearly three times higher than that of the TA19 alloy without TiAIN film. Friction coefficient,wear rate and specific wear rate of the TiAlN film all were less than those of the TA19 alloy regardless of the sliding speeds. As the sliding speed increased, wear mechanism of the TiAIN film converted from slight abrasive wear to heavy abrasive wear and oxidative wear.
引文
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[4]卞宏友,雷洋,王婷,等.工艺参数对激光沉积修复钛合金组织和显微硬度的影响[J].应用激光,2014,34(4):283-287.
[5]戴起勋.金属材料学[M].北京:化学工业出版社,2011.
[6]朱雪峰,余日成,黄艳华,等.热处理对TA19钛合金组织和力学性能的影响[J].金属热处理,2015,40(2):103-106.
[7]杨文茂,刘艳文,徐禄祥,等.溅射沉积技术的发展及其现状[J].真空科学与技术学报,2005,25(3):204-205.
[8]张永忠,黄灿.TA15钛合金表面激光熔化沉积Ti-Cr二元合金涂层[J].金属热处理,2010,35(1):67-71.
[9]李重河,朱明,王宁,等.铁合金在飞机上的应用[J].稀有金属,2009,33(1):84-91.
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[11] DONALD M, MATTOX. Handbook of Physical Vapor Deposition(PVD)Processing[M]. America:Noves Publications, 1998.
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[13]张平.热喷涂材料[M].北京:国防工业出版社,2006.
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