电火花沉积非晶涂层的组织结构与摩擦磨损性能  

Microstructure and tribology behaviors of Zr-based amorphous coating on ZL101 by electro-spark deposition

作　　者：王彦芳[1] 司爽爽 宋增金 孙旭[1] 石志强[1] 

机构地区：[1]中国石油大学(华东)材料科学与工程系,青岛266580 [2]山东省特检院日照分院,日照276826

出　　处：《焊接学报》2018年第7期121-124,共4页Transactions of The China Welding Institution

基　　金：山东省自然科学基金资助项目(ZR2014EMM006)

摘　　要：以Zr_(55)Al_(10)Ni_5Cu_(30)非晶态合金棒为电极,利用电火花沉积技术在ZL101铝合金表面制备了锆基合金涂层.利用X射线衍射仪(XRD)、扫描电镜(SEM)、显微硬度计和摩擦磨损实验机等对涂层的微观结构、表面形貌、显微硬度和摩擦磨损性能进行了分析测试.结果表明,沉积层表面较致密、均匀,为典型的"溅射状"花样形貌;沉积层主要由非晶、Zr O_2和Cu_8Zr_3等相组成;沉积层的平均显微硬度为1 555 HV 0.01,约为基材的15倍,摩擦系数仅为0.096,呈现出良好的减摩耐磨特性,沉积层的磨损机制主要为疲劳磨损和磨粒磨损.Using Zr_(55)Al_(10)Ni_5Cu_(30)(at.%)metallic glass alloy rods as electrode,Zr-based alloy coatings were prepared on ZL101 alloy surfaces by electrospark deposition technique.The microstructure and tribology behaviors of the deposited coatings were analyzed by optical microscope(OM),X-ray diffraction(XRD),microhardness tester,and friction and wear tester.The results show that the Zr-based deposition coating is mainly consists of amorphous,Al(Si),Zr O_2 and Cu_8Zr_3 phases.The surface morphologies of the deposition coatings are formed by deposition points superimposed to each other showing typical splash pattern morphology.The average microhardness of Zr-based deposited coating is about 1 555HV0.01,the coefficient friction is 0.096,which indicates that the coatings have good friction and wear performance.The main abrasion mechanism of the deposited coating is abrasive wear and fatigue wear.

关 键 词：电火花沉积 非晶沉积层 组织 摩擦磨损 

分 类 号：TG456.9[金属学及工艺—焊接]