摘要
采用冷喷涂技术将Fe87.4Cr2.5Si6.8B2.4C0.9非晶合金粉末喷涂到6061铝合金基体表面,设计单道次快速扫描喷涂试验,观察非晶合金颗粒的沉积特性,通过调控工艺参数制备非晶合金涂层,用X射线衍射仪(XRD)、差示扫描量热仪(DSC)、扫描电镜(SEM)、显微维氏硬度计及摩擦磨损试验机研究涂层显微组织和力学性能。结果表明:随温度升高,颗粒与基体结合率及变形程度都随之提升;冷喷涂非晶合金涂层致密,平均厚度达538μm,孔隙率仅为0.8%;对6061铝合金基体与非晶合金涂层进行磨损性能测试,其体积损失分别为3.13×10^-4、0.71×10^-4cm^3,涂层体积损失约为基体的20%。表明冷喷涂非晶合金涂层可改善铝合金基体表面的耐磨性。
The Fe87.4Cr2.5Si6.8B2.4C0.9 amorphous alloy powder was sprayed onto 6061 aluminum alloy substrate using cold spraying technology. A single-pass rapid scanning spraying experiment was designed to observe the deposition characteristics of amorphous alloy particles. The microstructure and mechanical properties of amorphous alloy coatings were studied using X-ray diffractometer(XRD),differential scanning calorimeter(DSC),scanning electron microscope(SEM),micro Vickers hardness tester,and friction testing machine. The results show that as the temperature increases,the bonding rate and the deformation degree of the particles increase. As the sprayed amorphous alloy coating is dense with an average thickness of 538 μm,the porosity is only 0.8%. For 6061 aluminum,the wear resistance of the alloy substrate and the amorphous alloy coating was tested,and the volume loss is 3.13×10-4 cm3 and 0.71×10-4 cm3,respectively. The volume loss of the coating is about 20% of the substrate,showing that the cold sprayed amorphous alloy coating can improve the wear resistance of the aluminum alloy substrate surface.
作者
王璐
王强
毛轩
WANG Lu;WANG Qiang;MAO Xuan(College of Metallurgy Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;National and Local Joint Engineering Research Center for Functional Materials Processing,Xi'an 710055,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2020年第6期6-11,共6页
Ordnance Material Science and Engineering
基金
国家自然科学青年基金(51801143)
陕西省自然科学基金重点项目(2017JZ012)。
关键词
冷喷涂
颗粒沉积特性
非晶合金涂层
耐磨性
cold spraying
particle deposition characteristics
amorphous coating
wear resistance
