超细碳化钨粉末特性对金刚石锯片刀头显微结构的影响  

Influence of characteristics of superfine WC powder on microstructure of diamond saw blade

作　　者：郑汉书[1] 邵刚勤[2] 熊震[2] 段兴龙[2] 

机构地区：[1]中国科学院广州晶体科技有限公司,广东广州510520 [2]武汉理工大学材料复合新技术国家重点实验室,湖北武汉430070

出　　处：《金刚石与磨料磨具工程》2006年第3期1-3,7,共4页Diamond & Abrasives Engineering

基　　金：教育部科技重点研究项目(105123);广东省科技攻关项目(200510201037)

摘　　要：采用超细WC粉末和工业级的Sn、N i、Co、Cu粉末以及金刚石为原料,经真空烧结后制备成金刚石锯片刀头。用扫描电镜(SEM)观察了WC粉末和合金的形貌,用能量散射谱(EDS)测试了合金的微区成分分布。研究结果表明,超细WC粉末的添加能改善Sn-N i-Co-Cu结合金刚石锯片刀头的显微结构,超细WC含量的增加有利于材料晶粒的细化和强度提高,Cu是烧结中产生液相和使成分偏析的重要影响因素,Co对晶粒异常生长影响很大,Sn的添加有利于晶粒的细化。Superfine WC Powder, commercial Sn, Ni, Co, Cu powders and diamonds were used for this study. Diamond alloy saw blades were prepared by vacuum sintering. The morphological characteristics of superfine WC powder and blades were observed by X-ray energy-dispersive spectrometer（EDS）. The element analysis in clifferent zones of fractured surface of alloy saw blades was determined by scanning electron microscopy （SEM）. The results showed that the addition of superfine WC powder can improve the microstructure of Sn-Ni-Co-Cu alloyed diamond blades. The increase of additive amount of superfine WC powder makes for finer grains and higher strength of materials. Element Sn is the principal factor of liquid-phase sintering and composition deviation. Element Co is the principal factor of coarse-grain growth. Element Sn is in favor of fine-grain structure.

关 键 词：超细WC 锯片刀头 显微结构 

分 类 号：TQ164[化学工程—高温制品工业]