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 Multi-layer Coatings with Different Numbers of Bilayers

摘要:

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 m³/N·m），以及较高的硬度（HK_0.05=38 000 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。

Abstract:

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 m³/N·m, the highest hardness of HK_0.05=38 000 MPa, and coating-substrate 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.