Co-Ni-Al复合黏结相硬质合金研究进展  

Research Progress in Cemented Carbide with Co-Ni-Al Composite Binder Phase

作　　者：龙坚战[1,2,3] 杜勇[2] 陆必志[1,3] 张卫兵[1,3] 徐涛[1,3] 张忠健[1,3] 易茂中[2] LONG Jianzhan;DU Yong;LU Bizhi;ZHANG Weibing;XU Tao;ZHANG Zhongjian;YI Maozhong(Zhuzhou Cemented Carbide Group Co.Ltd.,State Key Laboratory of Cemented Carbide,Zhuzhou 412000,Hunan,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Zhuzhou Cemented Carbide Group Corp.Ltd.,Zhuzhou 412000,Hunan,China)

机构地区：[1]株洲硬质合金集团有限公司硬质合金国家重点实验室,湖南株洲412000 [2]中南大学粉末冶金国家重点实验室,长沙410083 [3]株洲硬质合金集团有限公司硬质材料研发中心,湖南株洲412000

出　　处：《航空材料学报》2018年第5期47-58,共12页Journal of Aeronautical Materials

基　　金：湖南省自然科学基金资助项目(2016JJ5041)

摘　　要：介绍了Co-Ni-Al复合黏结相在硬质合金中的应用背景;简述了Co基高温合金最新研究成果和有序相沉淀强化黏结相硬质合金的性能特点;分析了集成计算材料工程在Co-Ni-Al复合黏结相开发上的应用;总结了WC-CoNi-Al硬质合金在制备、显微结构表征及性能研究上的进展情况。研究表明:Co-Ni-Al复合黏结相成分对合金的固-液界面能及液相形核驱动力具有明显的影响,相应地,也影响到黏结相晶粒大小和WC晶粒形貌,最终这些因素影响合金的性能。通过有序γ′相沉淀强化硬质合金黏结相可显著改善合金的性能,有望获得耐高温、抗腐蚀、抗氧化等性能优异的硬质合金材料。提出未来应重点研究Co-Ni-Al复合黏结相硬质合金的界面微结构。C含量与析出相关系以及抗磨性机理等方面。The application background of Co-Ni-Al composite binder phase in cemented carbide was introduced.The latest research results of Co-based superalloy and the properties of cemented carbide with binder strengthened by ordered phase were briefly described.The application of integrated computational material engineering in the research and development of Co-Ni-Al composite binder was introduced.The progress in the preparation,microstructure characterization and performance of WC-Co-Ni-Al cemented carbides were summarized.The results show that the composition of Co-Ni-Al composite binder has obvious influence on the solid-liquid interface energy and the liquid-phase nucleation driving force of the alloy.Accordingly,the grain size of the binder phase and the grain morphology of WC are affected.Ultimately these factors affect the performance of the alloy.It is pointed out that the performance of cemented carbide strengthened by orderedγ′phase precipitation can be improved significantly.It is expected to obtain high-performance cemented carbide materials with excellent high-temperature resistance,corrosion resistance and oxidation resistance.It is proposed that the interfacial microstructure,the relationship between C content and precipitation phase and the anti-wear mechanism of cemented carbide with Co-Ni-Al composite binder phase should be emphasized in future.

关 键 词：Co-Ni-Al复合黏结相 硬质合金 有序相沉淀 集成计算材料工程 

分 类 号：TF125.3[冶金工程—粉末冶金]