基于NaCl溶液的射流电解微铣削加工Ti-6Al-4V试验研究

扫码查看

原文链接

万方数据
维普

中文摘要：钛合金在航空航天、生物医疗、精密仪器等领域的微小构件制造中的应用前景广阔.基于电化学阳极溶解原理去除材料的射流电解微铣削加工技术在钛合金微细加工方面具有原理优势.然而,在电化学作用下,钛合金表面极易生成致密的钝化膜,导致材料溶解过程难以持续稳定进行.对此,试验测试了Ti-6Al-4V在不同组分和不同浓度电解液中的极化曲线,发现质量分数 10%NaCl溶液对钝化膜的破除能力强,且钝化-溶解过程相对稳定.在此基础上,探究了金属喷嘴内径、加工电压、扫描速度对射流电解微铣削加工微槽深宽比和杂散腐蚀范围的影响规律.最后,采用金属喷嘴内径 300 μm、加工电压 35 V、扫描速度 75 μm/s的优选工艺参数,在Ti-6Al-4V表面加工出平均槽宽为823.1 μm(标准差为10.42 μm),平均槽深为 157.26 μm(标准差为5.89 μm),表面粗糙度为2.006 μm(标准差为0.088 μm)的方形螺旋微结构.

外文标题：Experimental Study on Jet Electrochemical Micromilling of Ti-6Al-4V Based on NaCl Solution

外文摘要：The application prospects of titanium alloy in the manufacturing of microcomponents in aerospace,biomedical,and precision instruments are promising.The jet electrochemical micromilling(JEMM)technology,based on the principle of electrochemical anodic dissolution to remove material,holds advantages in the micromachining of titanium alloys.However,a dense passive film is easily formed on the surface of titanium alloys under the influence of electrochemical processes,making the material dissolution process difficult to sustain stably.To overcome this problem,the polarization curves of Ti-6Al-4V were measured in electrolytes with different compositions and concentrations.It was found that a 10%NaCl(mass fraction)solution exhibited a strong capability in breaking the passive film,and the passivation and dissolution process were relatively stable.Building upon this,the effect of the inner diameter of the metal nozzle,machining voltage,and scanning speed on the aspect ratio of microgrooves and the range of stray corrosion in JEMM was investigated.Finally,a square spiral microstructure was fabricated on the Ti-6Al-4V surface using optimal parameters with a metal nozzle inner diameter of 300 µm,machining voltage of 35 V,and scanning speed of 75 µm/s.The resulting groove had an average width of 823.1 µm(standard deviation of 10.42 µm),an average depth of 157.26 µm(standard deviation of 5.89 µm),and a surface roughness of 2.006 µm(standard deviation of 0.088 µm).

外文关键词：

Ti-6Al-4VJet electrochemical micromilling(JEMM)Polarization curvesProcess parametersMicrostructure

作者：

牛屾、于长洋、明平美、王思儒、李沙沙、秦歌

展开 >

作者单位：

河南理工大学机械与动力工程学院,焦作 454000

河南理工大学电气工程与自动化学院,焦作 454000

关键词：

Ti-6Al-4V 射流电解微铣削(JEMM) 极化曲线工艺参数微结构

基金：

国家重点研发计划中国博士后科学基金河南省重点研发与推广专项中原科技创新领军人才项目河南理工大学博士基金

项目编号：

2022YFB46016022020M682289222102220001214200510018B2020-30

出版年：

2024

DOI：

10.16080/j.issn1671-833x.2024.09.037

航空制造技术

北京航空制造工程研究所

航空制造技术

CSTPCD北大核心

影响因子：0.403

ISSN：1671-833X

年,卷(期)：2024.67(9)