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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。
The microstructure of cermets was analyzed by XRD, SEM and EDS, and their mechanical properties at room temperature were tested. Three-dimensional cutting finite element model is established in DEFORM finite element simulation software to simulate the cutting process of different relief angles. The simulation results of equivalent stress field, temperature distribution and wear amount are analyzed. The results show that the best back angle of cermet tool is 5 ° when cutting normalizing AISI-1045 steel. The experimental parameters of the cutting are consistent with those of the finite element simulation. The results of the cutting experiments show that the durability of the cermet tool is the best when the cutting clearance is 5 °, which verifies the correctness of the FEM simulation.