WC含量对Ti(C,N)基金属陶瓷显微组织的影响

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Effect of WC Content on the Microstructure of Ti(C,N)-based Cermets

1. Department of Aircraft Maintenance Engineering, Chengdu Aeronautic Polytechnic, Chengdu 610100, Sichuan, China;
2. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, Sichuan, China

摘要: 在Ti(C,N)基金属陶瓷中,Mo₂C常被用来提高Ti(C,N)和金属相Ni之间的润湿性。随着Mo₂C价格的上涨,WC作为替代品引起了人们的广泛关注。研究了WC含量对Ti(C,N)基金属陶瓷Ti(C_0.7N_0.3)-xWC-15%Ni显微组织的影响。研究结果表明,添加的WC都能固溶到TiC_0.7N_0.3中和(或)溶解到黏结相Ni中,显微组织都为典型的芯-环结构。当WC含量<15%时,WC对晶粒的细化效果不明显,当WC含量增至20%以上时,金属陶瓷的平均晶粒度明显下降至10μm以下。
- Ti(C,N)基金属陶瓷 /
- Ti(C,N) /
- WC /
- 显微组织
Abstract: Mo₂C is normally added to improve the wettability between Ti(C,N) and Ni in Ti(C,N)-based cermets.Due to the increasing price of Mo₂ C,much attention has been paid to Ti(C,N)-based cermets with WC addition.In this paper,effect of WC content on the microstructure of Ti(C_0.7N_0.3)-xWC-15%Ni cermets free of Mo₂ C was studied.The experimental results show that all the WC had been solid solved with TiC_0.7N_0.3or dissolved into Ni binder phase, and all the cermets have core-rim structure.WC has a strong effect of grain re-finement on microstructure(average grain size is below 10 μm) when WC content is above 20%.
- Ti(C,N)-based cermets /
- Ti(C,N) /
- WC /
- microstructure