The microstructure of the Ti(C,N)-based cermets cutter was analyzed by means of X-ray diffractometer (XRD) and scanning electron microscope (SEM) with energy disperse spectroscopy (EDS), respectively. The room temperature mechanical properties were measured. Three-dimensional cutting finite element model was built in DEFORM-3D finite element simulation software for simulating turning process of Ti(C,N)-based cermets cutters under different clearance angle. The simulation results of effective stress field, temperature distribution and the magnitude of tool wear were analyzed. It is concluded that the optimum clearance angle of Ti(C,N)-based cermets cutters is 5° when cutting normalized AISI-1045 steel. The parameters of the cutting experiments correlate well with the simulation parameters. The cutting experiment results show that the cermets cutter with the clearance angle 5° has the best durability, which verifies the correctness of the finite element simulation predictions.%采用XRD、SEM、EDS方法分析金属陶瓷的显微组织,并测试其室温力学性能.在DEFORM有限元模拟软件中建立三维切削有限元模型,对不同后角的切削过程进行仿真模拟.对等效应力场、温度分布及磨损量模拟结果进行分析,分析结果表明切削正火态AISI-1045钢时,金属陶瓷刀具的最佳后角为5°.切削实验参数与有限元模拟参数相一致,切削实验结果表明,刀具后角5°切削时,金属陶瓷刀具的耐用度最好,验证了有限元模拟预测的正确性.
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