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本文研究了3%~15%Mo添加对TiC-12%TiN-10%WC-25%Ni金属陶瓷显微组织和磁学、力学性能的影响。结果表明,经1 430℃真空烧结1 h后,金属陶瓷都由Ni基粘结相和Ti(C,N)陶瓷颗粒组成。随着Mo含量增加,粘结相中合金元素的总含量增加。陶瓷颗粒通常由黑芯、白色内环和灰色外环组成,当Mo含量为6%~9%时,陶瓷颗粒明显细化。不管Mo含量高低,金属陶瓷室温均呈顺磁性,但室温磁化强度和剩磁随着Mo含量增加而下降。金属陶瓷的抗弯强度在Mo含量为6%时达到峰值,洛氏硬度随着Mo含量增加先略有下降然后略有上升。
In this paper, the effects of 3% -15% Mo addition on the microstructure and magnetic and mechanical properties of TiC-12% TiN-10% WC-25% Ni cermets were investigated. The results show that after sintering at 1 430 ℃ for 1 h, the cermets are composed of Ni - based binder phase and Ti (C, N) ceramic particles. As Mo content increases, the total content of alloying elements in the binder phase increases. Ceramic particles are usually composed of black core, white inner ring and gray outer ring. When the content of Mo is 6% ~ 9%, the ceramic particles are obviously refined. Regardless of the Mo content, the cermets were paramagnetic at room temperature, but the room temperature magnetization and remanence decreased with increasing Mo content. The flexural strength of cermet reaches its peak when Mo content is 6%. Rockwell hardness decreases slightly with the increase of Mo content and then increases slightly.