论文部分内容阅读
研究了添加0%～2.5%(质量分数)晶粒长大抑制剂VC对Ti(C,N)基金属陶瓷组织和性能的影响。结果表明,添加VC后,组织中晶粒的芯部变小、环形相变薄,1.5%～2.5%VC的加入使材料的晶粒显著细化。添加VC可提高材料的抗弯强度和硬度,添加量为1%时,抗弯强度达到最大值1370MPa,添加量为2.5%时,维氏硬度达到最大值15.3GPa;适量添加VC可提高材料的断裂韧性,添加量为1%时,达到最大值8.6MPa·m1/2。VC添加量为0.5%时,材料维氏硬度和断裂韧性分别为14.4GPa和7.6MPa·m1/2,综合力学性能最好。
The effect of adding grain growth inhibitor VC (0% ~ 2.5%) on the microstructure and properties of Ti (C, N) -based cermets was investigated. The results show that the grain size decreases and the ring phase becomes thinner when the VC is added. The addition of 1.5% ~ 2.5% VC makes the grain of the material significantly refined. The addition of VC can improve the flexural strength and hardness of the material, the flexural strength reached the maximum of 1370MPa when the addition amount is 1%, the Vickers hardness reaches the maximum of 15.3GPa when the addition amount is 2.5% Fracture toughness, the maximum amount of 8.6MPa · m1 / 2 is achieved when the addition amount is 1%. The Vickers hardness and fracture toughness of the composites were 14.4GPa and 7.6MPa · m1 / 2, respectively, with the best mechanical properties.