Co含量对硬质合金组织和性能的影响  

Effects of Co Content on Microstructure and Mechanical Properties of Cemented Carbides

作　　者：王丽利[1] 李海艳[1] 刘宁[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《稀有金属与硬质合金》2011年第1期66-69,共4页Rare Metals and Cemented Carbides

摘　　要：采用粉末冶金工艺制备了不同Co含量的硬质合金材料。在常温下测量了材料的力学性能,并通过XRD、SEM等方法对材料的相结构、组织形貌等进行了分析。结果表明,随着Co含量的增加,显微组织中粘结相Co的平均自由程λγ增加,WC晶粒邻接度C降低,材料的抗弯强度上升而硬度下降。Cemented carbide materials with different Co content were prepared by powder metallurgy,mechanical properties of the materials were tested at room temperature,and phase composition,microstructure and morphology were studied using XRD,SEM and so on.The results show that with Co content increasing,the binder phase（Co） in the microstructure is of an increased average free path（λγ）,the adjacency degree（C） of WC grains decreases,the bend strength of the material increases but hardness decreases.

关 键 词：硬质合金 CO含量 组织形貌 力学性能 

分 类 号：TG135.5[一般工业技术—材料科学与工程]