Ti6Al4V钛合金超声波冷锻/微弧氧化涂层的制备及耐磨性能  

Wear Resistance of MAO Coated Ti6Al4V Alloy Prepared by Ultrasonic Cold Forging Technology

作　　者：顾艳红[1] 马慧娟[1] 陈玲玲[2] 杨远航[1] 刘琦[1] 刘家浚[3] 

机构地区：[1]北京石油化工学院机械工程学院,北京102617 [2]北京化工大学机电工程学院,北京100029 [3]清华大学机械工程系,北京100084

出　　处：《中国表面工程》2016年第1期87-95,共9页China Surface Engineering

基　　金：北京市自然科学基金(3152011);国家自然科学基金(51305036)

摘　　要：为了提高生物医用钛合金的耐磨性,利用超声波冷锻技术(UCFT)作为预处理,采用微弧氧化(MAO)技术制备出具有生物活性的MAO涂层。采用透射电子显微镜(TEM)和原子力显微镜(AFM)测量钛合金UCFT处理后表面纳米晶粒大小和表面粗糙度,采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和显微硬度计测量涂层的微观形貌、相组成和显微硬度,并在高速往复摩擦磨损试验机上对试样进行摩擦学性能测试。结果表明:超声波冷锻后的钛合金表面晶粒得到细化,平均表面粗糙度仅为36.98nm;UCFT-MAO涂层的显微硬度从330HV0.05提高到518HV0.05,经超声波冷锻预处理后的微弧氧化涂层的摩擦因数降低,UCFT-MAO试样在仿生液中的磨损量仅为基体试样的1/3。超声波冷锻技术作为预处理,显著提高了钛合金微弧氧化涂层的耐磨性能。To improve the wear resistance of biomedical titanium alloys,ultrasound cold forging technology（UCFT）was used as a pretreatment before micro-arc oxidation（MAO）coatings were prepared.The grain size and surface roughness of the sample treated by UCFT was measured by transmission electron microscope（TEM）and atomic force microscope（AFM）.Morphologies and phase composition were conducted by scan electron microscope（SEM）and X-ray diffraction（XRD）.Micro-hardness tester was used to measure the sample hardness.The high-speed reciprocating friction and wear tester was used to test the wear performance of the samples.The results show that the surface of titanium alloys is refined with small grain by UCFT.The average surface roughness is only 36.98 nm.The hardness increases from330 HV0.05 of the untreated samples to 518HV0.05 of the UCFT-MAO samples.The friction coefficient decreases and the weight loss of impreved by UCFT-MAO samples is only one third of the untreated samples.The wear resistance of the MAO coated titanium alloys is improved by UCFT processing.

关 键 词：钛合金 超声波冷锻 微弧氧化 耐磨性 

分 类 号：TG174.451[金属学及工艺—金属表面处理] TG115.58[金属学及工艺—金属学]