湖南大学学报（自然科学版）2024，Vol.51Issue(4)：90-98,9.DOI:10.16339/j.cnki.hdxbzkb.2024174
医用钛合金海尔贝克磁场阵列化学磁流变抛光研究
Study on Chemical Magnetorheological Polishing of Medical Titanium Alloy by Halbach Magnetic Field Array
摘要
Abstract
In this paper,a chemical magnetorheological polishing method based on the Halbach magnetic field array is utilized to enhance the precision and efficiency of polishing medical titanium alloy(TC4).Strengthening the magnetic field strength is used for the Halbach magnetic field array,and hydrogen peroxide solution is incorporated as an oxidant in the polishing process.Firstly,the Halbach magnetic field array is compared with the conventional N-S magnetic field array through simulation.Subsequently,the activity of carbonyl iron powder is adjusted to verify the experimental feasibility.The effects of working gap,main shaft speed,and abrasive particle size on surface roughness and contact angle of workpiece surface are then investigated.The results demonstrate that the Halbach magnetic field array exhibits higher magnetic-field strength than the conventional N-S magnetic field array.Moreover,the surface roughness of the medical titanium alloy polished using this method is 80%lower than that achieved through single pure magnetorheological polishing.Optimal smoothing of the workpiece surface is achieved at a working gap of 0.8 mm,a main shaft speed of 400 rad/min,and an abrasive particle size of 1 µm,resulting in an optimal Ra value of 15.5 nm.The surface contact angle measurements indicate that the majority of contact angle values for the titanium alloy surface in the experimental group are less than 90°.In conclusion,the application of this method for polishing medical titanium alloy yields an ultra-smooth surface and enhances its hydrophilicity,thereby meeting the standards required for medical titanium alloys.关键词
医用钛合金/表面粗糙度/接触角/化学磁流变抛光/海尔贝克磁场阵列Key words
medical titanium alloy/surface roughness/contact angle/chemical magnetorheological polishing/Halbach magnetic field array分类
矿业与冶金引用本文复制引用
张祥雷,陈卓杰,廖煜晖,周芬芬,冯铭..医用钛合金海尔贝克磁场阵列化学磁流变抛光研究[J].湖南大学学报（自然科学版）,2024,51(4):90-98,9.基金项目
浙江省教育厅一般科研项目(Y202249064),Scientific Research Fund of Zhejiang Provincial Education Department(Y202249064) （Y202249064）
温州市重大科技创新攻关项目(ZG2022029),Major Science and Technology Innovation Project in Wenzhou(ZG2022029) （ZG2022029）
浙江省自然科学基金资助项目(LQ22E050008,LQ19E050010),Natural Science Foundation of Zhejiang Province(LQ22E050008,LQ19E050010) （LQ22E050008,LQ19E050010）
