摘要
为了研究一种高效率、高质量的TA1钛合金植入物表面光整加工方法,在对TA1钛合金电解质等离子抛光过程中的电流-电压特性分析的基础上,研究工作电压、抛光液温度及抛光时间等关键因素对表面粗糙度和材料去除率的影响规律及作用机制,并对电解质等离子抛光前后试样表面的显微形貌、微观组织结构及硬度变化进行表征,验证该方法的有效性。研究结果表明,当工作电压为300和350 V时,采用电解质等离子抛光能够获得表面粗糙度值较小的表面,并且材料去除率随工作电压升高而降低;随抛光液温度升高,试样表面粗糙度增加,同时材料去除率降低;随抛光时间延长,试样表面粗糙度呈下降趋势;电解质等离子抛光后TA1钛合金结晶度提高,晶粒长大;电解质等离子抛光可去除TA1钛合金表面机械作用产生的加工硬化层,同时增强材料的塑性和韧性。
In order to develop a high-efficiency and high-quality surface finishing method for TA1 titanium alloy implants,the current-voltage characteristics in the process of electrolytic plasma polishing were analyzed.On this basis,the influence law and mechanism of key factors such as working voltage,polishing liquid temperature and polishing time on the surface roughness and material removal rate of TA1 titanium alloy were studied.In order to verify the effectiveness of the method,the micromorphology,microstructure and hardness of the surface of the samples before and after electrolytic plasma polishing were characterized.The research results show that when the working voltage is 300 and 350 V,electrolytic plasma polishing can obtain the surface with small surface roughness,and the material removal rate decreases with the increase of working voltage.With the increase of polishing liquid temperature,the surface roughness of the sample increases,while the material removal rate decreases.With the prolongation of polishing time,the surface roughness of the sample shows a downward trend.After electrolytic plasma polishing,the crystallinity of TA1 titanium alloy increases,and the grains grow.Electrolytic plasma polishing can remove the work-hardened layer produced by mechanical action on the surface of TA1 titanium alloy,while enhancing the plasticity and toughness of the material.
作者
李思雪
孙桓五
杨冬亮
段海栋
纪刚强
LI Sixue;SUN Huanwu;YANG Dongliang;DUAN Haidong;JI Gangqiang(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;National Demonstration Center for Experimental Coal Resource and Mining Equipment Education,Taiyuan 030024,China)
出处
《现代制造工程》
CSCD
北大核心
2023年第1期90-96,82,共8页
Modern Manufacturing Engineering
基金
山西省重点研发计划项目(201903D121091)。
