摘要
采用电弧离子镀技术在硬质合金基体和立式面铣刀上分别沉积了AlTiN、AlTiCrN/AlTiN、AlTiSiN/AlTiN纳米多层涂层,采用扫描电子显微镜、X射线粉末衍射仪、能谱仪、纳米划痕、纳米压痕以及摩擦实验和切削实验等对AlTiN、AlTiCrN/AlTiN、AlTiSiN/AlTiN纳米多层涂层的结构、力学性能、摩擦性能和切削性能进行分析。结果表明,上述涂层表面形貌均较平整、大颗粒数量较少,涂层截面均较为致密。AlTiN涂层的膜基结合力为47 N,AlTiCrN/AlTiN在极限载荷为49.79 N时出现大块剥落,而AlTiSiN/AlTiN涂层的膜基结合力较大,为53.76 N。AlTiN、AlTiCrN/AlTiN、AlTiSiN/AlTiN涂层的硬度分别为24.9±3.42,26.24±2.36,32.74±4.21 GPa。在600℃高温摩擦磨损测试过程中,AlTiN涂层其磨损机制主要表现为磨粒磨损和氧化磨损,而AlTiCrN/AlTiN及AlTiSiN/AlTiN涂层磨损机制主要为粘着磨损和氧化磨损。涂层刀具铣削加工钛合金(Ti6Al4V)的寿命长短依次为AlTiN<AlTiCrN/AlTiN<AlTiSiN/AlTiN。AlTiN涂层刀具的磨损形式主要是粘着磨损氧化磨损,AlTiCrN/AlTiN涂层铣刀的磨损形式为磨粒磨损、粘着磨损及氧化磨损,AlTiSiN/AlTiN涂层的磨损形式为边界磨损、粘着磨损、氧化磨损。AlTiCrN/AlTiN、AlTiSiN/AlTiN多层涂层的硬度和膜基结合力较高且具有较低的磨损率,使得涂层在切削过程中具有更长的切削寿命。
The surfaces of cemented carbide substrate and face-milling tool were modified with the AlTi （X） N/ AlTiN （X = Cr, Si） muhilayered coatings synthesized by arc ion plating. The interracial adhesion and surface tribological behavior of the multilayered coatings were characterized with scanning electron microscopy, X-ray diffraction, energy dispersive spectroscopy and conventional mechanical probes. The results show that the smooth compact muhilayered coatings with strong interracial adhesion significantly improved the surface hardness and wear-resistance to varying degrees. For example, the interfacial adhesion of the AlTiN, AlTiCrN/AlTiN and AlTiSiN/AlTiN coatings were 47,49.79 and 53.76 N, respectively. The increased milling lifetime of the surface modified tools was listed in an ascending order： AlTiN 〈 AlTiCrN/AlTiN 〈 AlTiSiN/AlTiN. The adhesion-wear, abrasive-wear and oxidation- wearpossibly accounted for the wear mechanisms of the muhilayered coatings. We suggest that the AlTi（X） N/AlTiN （X = Cr, Si） coatings be of some technological interest in machining of titanium alloys.
作者
费加喜
赵升升
吴正涛
高翔
王启民
Fei Jiaxi1, Zhao Shengsheng2. , Wu Zhengtao1, Gao Xiang1, Wang Qimin1(1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China ; 2. Shenzhen Polytechnic, Shenzhen 518055, Chin)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2018年第3期199-207,共9页
Chinese Journal of Vacuum Science and Technology
基金
国家自然科学基金项目(No.51522502
51401128)
中国博士后科学基金项目(No.2016M600641)
广东省科学计划项目(No.2016A050502056)
作者简介
联系人:王启民,Tel:(020)39322740,E-mail:qmwang@gdut.edu.cn;联系人:赵升升,(0755)26731214;E-mail:sszhao@szpt.edu.cn
