原位自生WC-Cr_3C_2复相陶瓷增强铁基表面复合材料  

In-situ WC-Cr_3C_2 Carbide Cermets Reinforced Surface Composites on a Ferrous Matrix

作　　者：伍天华[1] 李文戈[1] 

机构地区：[1]上海工程技术大学材料科学与工程学院,上海201620

出　　处：《材料科学与工程学报》2009年第6期924-927,共4页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(50772066);上海市教委"曙光计划"资助项目(05SG55);上海市教委重点学科资助项目(XK0706)

摘　　要：采用激光熔覆协同燃烧合成表面涂层技术在铁基材料表面原位生成复相陶瓷涂层。利用扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)等方法对涂层的物相组成、显微形貌、组织成分等进行了研究,结果表明涂层主要是由WC、Cr3C2、-σFeCr和Fe2W所组成的复相体系。界面形貌特征表明涂层与基体之间为冶金结合。硬度及摩擦磨损试验表明,涂层的硬度及耐磨性能明显高于基体材料。热震实验结果显示涂层与基体具有良好的结合力。A multiphase cermet coating on carbon steel was fabricated by laser cladding cooperated combustion synthesis.The microstructure,phase composition,element distribution and microhardness have been analyzed by SEM,XRD,EDS and microhardness-tester,respectively.The results show that the coating was a multi-phase system which consisted of WC,Cr_3C_2,σ-FeCr and Fe_2W. The interface morphology showed that the coating and the substrate were metallurgically bonded.The hardness measurements and friction wear test show that the hardness and the wear resistance of the composite were superior to substrate. Besides, the thermal cycling test demonstrates that the coating was well bonded with the substrate.

关 键 词：WC-Cr3C2 涂层 激光熔覆 燃烧合成 原位合成 

分 类 号：TB331[一般工业技术—材料科学与工程] TG156[金属学及工艺—热处理]