Cr_3C_2对WCoB-TiC金属陶瓷组织和性能的影响  

Effect of Dopped Cr_3C_2 on Microstructure and Properties of WCoB-TiC Based Cermets

作　　者：柯德庆[1] 潘应君[1] 张恒[1] 陆旭峰[1] 洪波[1] 徐源源[1] 

机构地区：[1]武汉科技大学材料与冶金学院,武汉430081

出　　处：《材料导报》2015年第18期80-83,共4页Materials Reports

摘　　要：以WC、TiB2和Co粉末为原材料,采用原位反应液相烧结工艺,在1400℃真空烧结炉中制备了WCoBTiC复相金属陶瓷。利用FE-SEM、EDS和XRD等技术,研究了不同含量晶粒长大抑制剂Cr3C2对WCoB-TiC金属陶瓷组织和性能的影响。结果表明,添加Cr3C2能有效抑制WCoB-TiC金属陶瓷晶粒异常长大,使得材料获得更均匀细小的微观组织,并且提高硬度和耐磨性能。随着抑制剂Cr3C2含量的增加,金属陶瓷的晶粒更细小均匀(晶粒尺寸可达1.0μm),硬度随之升高到91.0HRA,并且耐磨性能得到明显改善,磨损损失质量远小于未添加Cr3C2的试样。With WC, TiB2 and Co powders as raw materials, WCoB-TiC based cermets were prepared by liquid phase reaction sintering in vacuum furnace at 1400 ℃. The consolidation of WCOPrTiC based cermets with additions of Cr3℃ grain growth inhibitors were studied. The effect of adding different contents of Cr3 ℃ to WCOB-TiC based cer- mets on the grain growth was studied. The microstructure and mechanical properties of WCOB-TiC based cermets were analyzed by means of field emission scanning electron microscope （FE-SEM）, energy dispersive spectroscopy （EDS） and X-ray diffraction （XRD） and so on. The results showed that addition of Cr3C2 could effectively suppress the constant grain growth in WCoB-TiC based cermets. The average size of the grains in WCOB-TiC based cermets is only 1.0μ m and thus the inhibitors obtains the higher hardness （91.0HRA）. Mechanical properties （hardness and wear resistance） of WCot3-TiC based cermets were linearly increased with the increase of Cr3C2.

关 键 词：WCoB-TiC金属陶瓷 原位反应液相烧结 晶粒长大抑制剂 

分 类 号：TB35[一般工业技术—材料科学与工程]