【摘要】 将粉末冶金技术和原位反应技术相结合,制备了不同V/Ti原子比的(Ti,V)C/Fe复合材料(V/Ti=0,0.4,0.6,0.8)。用扫描电镜(SEM)、X射线衍射等测试方法对制备的复合材料进行了组织结构及相组成分析,用洛氏硬度计测试试样的硬度。研究结果表明:所制备的复合材料致密化好,硬度达60～65HRC,(Ti,V)C/Fe增强相颗粒尺寸大部分小于2μm,且随着V/Ti比的提高,(Ti,V)C的面间距和晶格常数相对TiC减小,(Ti,V)C增强相颗粒形态更规则,趋于球形。V/Ti为0.4时(Ti,V)C/Fe复合材料具备更好的微观结构。更多还原

【Abstract】 (Ti,V)C/Fe composites which have different V/Ti atomic ratio(V/Ti=0,0.4,0.6,0.8) were fabricated via the powder metallurgical and in situ reactive synthesis technology. The microstructure of the composites was analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD). The hardness of the composites was measured by Rockwell apparatus. The results indicate that the densification of the composites is high,the Rockwell hardness numbers are 60～65HRC, the (Ti,V)C particle sizes are mostly less than 2μm . Additionally, with the increasing of V/Ti atomic ratio, compared with TiC, the face spaces and the lattice constants of (Ti,V)C are reduced, the (Ti,V)C particles assume spherulitic morphology. The (Ti,V)C/Fe composite with V/Ti atomic ratio equaling 0.4 possesses the finest microstructure.更多还原