不同双层结构AlCrN/AlCrVN多层涂层的力学和磨损性能

Mechanical and Wear Properties of AlCrN/AlCrVN Multilayer Coatings with Different Numbers of Bilayers

采用电弧离子镀的方法制备了不同数目(1、2、4、6)双层结构的AlCrN/AlCrVN多层涂层,并研究了多层结构对涂层微观结构、力学、摩擦学和切削性能的影响。结果显示,沉积态AlCrN/AlCrVN多层涂层主要由固溶(Al,Cr)N组成,优先生长方向为[111]晶向。与其他多层涂层相比,具有6层双层结构的AlCrN/AlCrVN涂层在高温下表现出较低的摩擦系数(约0.46)和磨损率(0.15×10^(−11) m^(3)/N·m),以及较高的硬度(HK_(0.05)=38000 MPa)和膜-基结合强度(L_(C2)=53±1 N)。多层涂层相邻层之间形成了较多的界面,有助于提高多层涂层的硬度和耐磨性。切削试验结果显示,当切削磨损标准VB=0.2时,AlCrN/AlCrVN-6涂层具有较高的硬度和耐磨性,最长的切削长度为7.4 m。

AlCrN/AlCrVN multi-layer coatings with different numbers(1,2,4,6)of bilayers were deposited by arc ion plating method.The effects of multi-layer structure on microstructure,mechanical properties,tribological properties,and cutting performance were investigated.The results show that the deposited AlCrN/AlCrVN multi-layer coatings are mainly composed of solid solution(Al,Cr)N with preferred growth orientation of[111]crystal orientation.Compared with other multi-layer coatings,the lowest coefficient of friction(~0.46),the lowest wear rate of 0.15×10^(−11) m^(3)/N·m,the highest hardness of HK_(0.05)=38000 MPa,and coatingsubstrate bonding strength of L_(C2)=53±1 N can be achieved for AlCrN/AlCrVN multi-layer coating with 6 bilayers at high temperature.The improvement in hardness and wear resistance is due to the formation of more interfaces between adjacent layers.Cutting test results reveal that AlCrN/AlCrVN coating with 6 bilayers has the longest cutting length of 7.4 m under the cutting wear standard condition of flank wear VB=0.2 due to its relatively higher hardness and better wear resistance.