碳含量对金属陶瓷组织和力学性能的影响

Effect of Carbon Content on Microstructure and Mechanical Properties of Cermet

制备4种不同碳含量Ti(C,N)基金属陶瓷,通过碳分析仪、氧氮分析仪、扫描电镜、X射线衍射仪、维氏硬度测试仪等仪器检测Ti(C,N)基金属陶瓷的合金碳、氧、氮成分、微观组织、力学性能等,分析碳含量对显微组织和力学性能的影响。结果表明,随着碳含量增加,合金中氧含量降低,黏结相钴、镍中固溶的W、Mo、Ti含量降低,黑芯相减少,壳层灰色(Ti、W、Mo、Ta、Nb)C,N固溶环形相增多,比饱和磁化强度上升,硬度下降。碳含量也会对断裂韧性及TRS产生影响,其影响程度在合金碳质量分数为7.37%时达到峰值。

Four kinds of Ti(C,N)-based cermets with different carbon contents are prepared.The alloy carbon,oxygen and nitrogen components,microstructure and mechanical properties of Ti(C,N)-based cermets are tested by carbon analyzer,oxygen and nitrogen analyzer,scanning electron microscope,X-ray diffractometer,Vickers hardness tester and other instruments.The paper analyzes the effect of carbon content on microstructure and mechanical properties.The results show that with the increase of carbon content,the oxygen content in the alloy decreases,the content of solid solution W,Mo,Ti in the binder phase cobalt and nickel decreases,the black core phase decreases,the gray(Ti,W,Mo,Ta,Nb)C,N solid solution circular phase increases in the shell layer,the specific saturation magnetization increases,and the hardness decreases.Carbon content also has an effect on fracture toughness and TRS,reaching a high value when the mass fraction of the alloy carbon is 7.37%.