Preparation Of Ti-Si-C Coated Tool And The Evaluation Of Its Cutting Performance

With the development of a variety of new materials, higher requirements of machining tool are put forward. As a new type of tool material, coated tools exhibit many advantages in the cutting difficult-to-machine materials. It is an important direction in the research of tool materials at present. Ti-Si-C coating has high hardness, good wear resistance and low friction coefficient. It has a broad prospect in the application of coating tools. In this paper, the Ti-Si-C coating is prepared by magnetron sputtering, and the cutting performance of coated tool is evaluated. The main work and results are as follows:1. The sputtering yield of the Ti, Si, C three targets was simulated. The three element targets sputtering yield and the energy distribution of sputtered particles were analyzed when argon ion bombarded the target with different energy and different incident direction. It would provide a basis for understanding the sputtering process and the selection of parameters.2. The process of preparing Ti-Si-C coating by magnetron sputtering was studied. The surface morphology, element content, hardness, friction coefficient and adhesion properties of the coating were tested by AFM, EDS, microhardness tester, friction wear tester and Rockwell hardometer. The influence of sputtering power, substrate temperature, working pressure and the flow rate of argon on the coating were studied. The Ti-Si-C coated tool was prepared by using the optimal process parameters.3. The cutting performance of Ti-Si-C coated tool was studied. The cutting performance of YT15 and YS25 two kinds of uncoated and coated tools was discussed. The cutting experiment was carried out on 45# hardned steel by using different cutting parameter. The cutting force, cutting heat, chip shape and tool wear were investigated. The results show that the coating on YS25 has a great improvement of cutting performance when compared with the coating prepared on YT15.