Ti-6Al-4V合金渗氮层的生物腐蚀行为  

Biological corrosion behavior of nitriding layer of Ti-6Al-4V alloy

作　　者：姜雪婷 刘港 周县 肖飞燕 刘静[1] 杨峰[1] Jiang Xueting;Liu Gang;Zhou Xian;Xiao Feiyan;Liu Jing;Yang Feng(School of Materials and Architectural Engineering,Guizhou Normal University,Guiyang Guizhou 550001,China)

机构地区：[1]贵州师范大学材料与建筑工程学院,贵州贵阳550001

出　　处：《金属热处理》2022年第1期197-201,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(51574096);黔科合平台人才([2020]1Z041);贵州省研究生教育创新计划(黔教合YJSCXJH[2020]109)。

摘　　要：采用真空感应快速渗氮技术对Ti-6Al-4V合金进行表面渗氮,将渗氮前后的试样置于SBF溶液中探究其耐蚀性。利用维氏硬度计、光学显微镜、电化学工作站、光学3D表面轮廓仪、扫描电镜(SEM)和X射线衍射(XRD)等技术对渗氮层进行测量和观察。试验结果表明:820℃下对Ti-6Al-4V钛合金进行真空感应渗氮处理后,渗氮层厚度达20μm,其氮化物层硬度得到明显提高。同时,经过感应渗氮处理后样品的表面粗糙度增加。电化学试验表明经感应渗氮后Ti-6Al-4V钛合金的耐蚀性明显增强。Surface nitriding of the Ti-6 Al-4 V alloy was carried out by vacuum induction rapid nitriding technology, and the specimens before and after nitriding were placed in SBF solution to explore its corrosion resistance. The nitriding layer was characterized by means of Vickers hardness tester, metallographic microscope, electrochemical workstation, optical 3 D surface profilometer, scanning electron microscope(SEM) and X-ray diffraction(XRD). The results show that the thickness of nitriding layer in Ti-6 Al-4 V alloy reaches 20 μm after vacuum induction nitriding treatment at 820 ℃. And the hardness of nitriding layer is obviously improved. Meanwhile, the surface roughness of the sample increases after induction nitriding. Electrochemical tests show that the corrosion resistance of the Ti-6 Al-4 V titanium alloy is enhanced obviously after induction nitriding.

关 键 词：TI-6AL-4V合金 真空感应快速渗氮 耐蚀性 SBF溶液 

分 类 号：TG178[金属学及工艺—金属表面处理]