AlNiZr基非晶纳米晶复合涂层组织与性能研究  

Investigations on Microstructure and Property of AlNiZr-based Amorphous and Nanocrystalline Composite Coating

作　　者：范建文[1] 梁秀兵[1] 张志彬[1] 陈永雄[1] 商俊超[1] 

机构地区：[1]装甲兵工程学院机械产品再制造国家工程研究中心,北京100072

出　　处：《装甲兵工程学院学报》2017年第3期94-99,110,共7页Journal of Academy of Armored Force Engineering

基　　金：国家自然科学基金资助项目(51505500;51375492)

摘　　要：针对铝合金硬度低、耐磨损性能差的问题,利用自动化高速电弧喷涂技术在6061铝合金表面制备了AlNiZr基非晶纳米晶复合涂层,分别采用X射线衍射仪(X-Ray Diffraction,XRD)、扫描电子显微镜(Scanning Electron Microscope,SEM)、能谱仪(Energy Dispersive Spectrometer,EDS)、透射电子显微镜(Transmission Electron Microscope,TEM)、显微硬度计、往复式摩擦磨损试验机和三维形貌仪表征了涂层的相结构、微观截面形貌和结构、显微硬度、干摩擦性能和磨损体积。结果表明:AlNiZr基复合涂层由非晶纳米晶复合结构组成,涂层组织均匀、结构致密,氧含量低,孔隙率约为1.2%,非晶含量约为71.7%,平均显微硬度达到379.2 HV_(0.1),分别为纯铝涂层和6061铝合金硬度的8.7倍和3.2倍;复合涂层摩擦因数整体大于纯铝涂层和6061铝合金,其最大值为0.74;载荷为1 N时,复合涂层的磨损体积分别为纯铝涂层与6061铝合金的1/6与1/5,载荷为15 N时比纯铝涂层与6061铝合金减少了1/5。In accordance with the problems of low hardness and poor wear-resistance performance of aluminum alloy,the AlNiZr-based amorphous and nanocrystalline composite coating is prepared on the substrate of 6061 aluminum alloy by using an automatic high velocity arc spraying technology. Its phase structure,micro section and microstructure, and microhardness are analyzed by X-Ray Diffraction（ XRD）,Scanning Electron Microscope（ SEM）,Energy Dispersive Spectrometer（ EDS）,Transmission Electron Microscope（ TEM） and microhardness tester. The dry friction performance and wear volume of coating are investigated by a reciprocating tribometer and three dimension profilometer,respectively. The results show that the AlNiZr-based composite coating is composed of amorphous and nanocrystalline composite structure,possesses homogeneous and dense microstructure with porosity of 1. 2% and low oxygen content; in addition,its amorphous content is about 71. 7%. The average microhardness reaches 379. 2HV0. 1,which is 3. 2 times higher than that of the 6061 aluminum alloy and 8. 7 times higher than that of the pure aluminum coating; the Coefficient Of Friction（ COF） of AlNiZr-based composite coating is higher than that of the pure aluminum coating and 6061 aluminum alloy,and the maximum is up to 0. 74; under the load of 1 N,the wear volume is only 1/6 and 1/5 as compared with the pure aluminum coating and 6061 aluminum alloy; under the load of 15 N,the wear volume is both lower 1/5 as compared with the pure aluminum coating and 6061 aluminum alloy.

关 键 词：高速电弧喷涂 AlNiZr基非晶纳米晶复合涂层 耐磨性 防滑 

分 类 号：TG174.44[金属学及工艺—金属表面处理]