WC定位增强高铬铸铁复合材料的研究  

Study on WC Positioning Reinforced High Chromium Cast Iron Composite

作　　者：魏丹 罗铁钢 董应虎[1] 顷淮斌 郑志斌 郑开宏 WEI Dan;LUO Tie-gang;DONG Ying-hu;QING Huai-bin;ZHENG Zhi-bin;ZHENG Kai-hong(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330000,Jiangxi,China;Guangdong Provincial Key Laboratory for Technology and Application of Metal Toughening,Guangdong Institute of Materials and Processing,Guangzhou 510650,Guangdong,China)

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330000 [2]广东省金属强韧化技术与应用重点实验室,广东省材料与加工研究所,广东广州510650

出　　处：《铸造》2020年第2期142-148,共7页Foundry

基　　金：广东省科学院实施创新驱动发展能力建设专项(2018GDASCX-0117);广州市对外科技合作项目(201704030094);广东省科技计划项目(2018A050506055,2017A070702019,2018dr013)。

摘　　要：采用粉末冶金技术与铸造技术相结合的方法,成功制备了原位合成的碳化钨颗粒定位增强高铬铸铁基复合材料,应用金相显微镜、XRD、EDS、SEM等研究了复合材料的组织、界面及抗三体磨损性能。研究结果表明:复合材料由WC颗粒、M7C3碳化物、马氏体及残余奥氏体组成,采用原位生成的碳化钨粒径为1~3μm,体积分数可达60%,碳化钨与基体的界面结合情况良好,复合材料的抗磨损性能是高铬铸铁的1.74倍。In this study,tungsten carbide particles reinforced high chromium cast iron composite was successfully prepared by the combination of powder metallurgy technique with casting method.The microstructure,interface binding and anti-three-body wear properties of the composite were studied by metallographic microscope,XRD,EDS and SEM.The results show that the microstructure of the composite consists of WC particles,M7C3 carbide,martensite and residual austenite,among which the size of tungsten carbide particles produced by in-situ synthesis is 1-3μm and the volume fraction can reach 60%.Moreover,the interface bonding between tungsten carbide particles and matrix is in good condition.Therefore,the composite material has better wear resistance than chromium cast iron,with an increase of 1.74 times.

关 键 词：内原位生成法 高铬铸铁 碳化钨 三体磨损 界面 

分 类 号：TG146.2[一般工业技术—材料科学与工程]