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采用真空阴极多弧离子镀技术,分别在Cr8、W6、Cr12及V-4E四种不同材质模具钢表面制备了Al Cr N多元纳米硬质涂层。利用划痕仪、工具显微镜、HV显微硬度计、球磨仪、SEM及XRD对Al Cr N涂层硬度,膜层厚度、结合力、摩擦系数进行了对比测试,并对涂层磨痕宽度、划痕宽度、表面形貌及相结构进行了表征。结果表明:相对于其它三种基材,V-4E基材的Al Cr N涂层显微硬度更高、膜基结合力更好、摩擦系数更低、耐磨性最好;四种基材的表面形貌基本一致,均有大颗粒及凹坑,V-4E基材Al Cr N涂层的晶粒尺寸最小,沉积的Al Cr N涂层结构更致密,耐磨性更优异。
Multi-layer nano-hard Al Cr N coatings were prepared on the surface of die steel with four different materials, Cr8, W6, Cr12 and V-4E by vacuum cathode multi-arc ion plating. The hardness, film thickness, cohesion and friction coefficient of Al Cr N coating were tested by using a scratch tester, a tool microscope, a HV microhardness tester, a ball mill, SEM and XRD. Scratch width, surface morphology and phase structure were characterized. The results show that compared with the other three substrates, the Al-Cr coating of V-4E substrate has higher microhardness, better film-based adhesion, lower friction coefficient and better wear resistance. Compared with the other three substrates, The surface morphology of the Al-Cr N-coated Al-Cr coating was the same. Both of them had large grains and dimples. The grain size of V-4E Al-Cr coating was the smallest and the deposited Al-Cr-N coating was more compact with better wear resistance.