Research on Organizational Structure of TiN-based Multiple composite Coating

In this paper, the TiN-based of CrTiAlN multiple composite coating were deposited on die steel substrates. The phase structure, chemical composition and morphology of the coating were tested by XRD, SEM and EDS respectively. The adhesive strength between film and substrate and microhardness about the coating were tested by Rockwell hardometer and Vickers hardometer. The results showed that the coating surface morphology of CrTiAlN had become tightly clustered granular particles, and the section morphology had a structure with columnar crystal. The main crystalline phases of CrTiAlN coating were consisting of TiN, CrN, Cr2N and so on. Rockwell indentation test showed that it had good bonding force between the CrTiAlN coating and the die steel substrates.