碳钢表面燃烧合成网络结构Cr_3C_2-WC陶瓷复合涂层的相组成与性能  

PHASE COMPOSITIONS AND PROPERTIES OF Cr_3C_2-WC INTERPENETRATING NETWORKS COMPOSITE COATING BY COMBUSTION SYNTHESIS ON SURFACE OF CARBON STEEL

作　　者：李文戈[1] 陈莹莹[1] 伍天华[1] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《硅酸盐学报》2010年第8期1468-1472,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50772066);上海市教委"曙光计划"(05SG55);上海市重点学科建设(J51402)资助项目

摘　　要：利用燃烧合成技术,在普通碳钢表面原位自生Cr3C2-WC网络结构陶瓷复合涂层。通过X射线衍射仪、扫描电子显微镜、能谱仪和显微硬度计等测试手段对涂层中的网络结构陶瓷增强相的组织形貌、物相组成、化学成分及力学性能等进行了表征。结果表明:涂层由Cr3C2,WC,FeNi3,σ-FeCr和δ-CrNi等组成,Cr3C2-WC网络结构增强相由过饱和固溶体共晶析出。涂层与基体间的结合为冶金结合;表面涂层厚度约为2.0mm,显微硬度约为7.2GPa。制备的表面复合材料的硬度高于基体,改性效果明显。Cr3C2-WC interpenetrating network composite coating on carbon steel was fabricated by in-situ combustion synthesis. The microstructure,phase composition,element distribution and microhardness of the network coating were analyzed by scanning electron microscope,X-ray diffraction,energy dispersive spectrometer and microhardness-tester,respectively. The results show that the coating is a multi-phase system consisting of Cr3C2,WC,FeNi3,σ-FeCr and δ-CrNi. The Cr3C2-WC network structure can be separated from supersaturated solid solution by eutectic precipitation. The interface morphology of the coating and the substrate shows that it was metallurgically bonded. The thickness of the coating is about 2.0 mm,and its microhardness is about 7.2 GPa. The hardness of composite is superior to substrate.

关 键 词：燃烧合成 原位自生 网络结构增强 碳化铬 碳化钨 

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]