等离子体电化学抛光参数对GH2787变形高温合金的影响分析  

Analysis of Influence of Plasma Electrochemical Polishing Parameters on GH2787 Deformed High Temperature Alloy

作　　者：李欣 潘娜 邓娟 程鑫 蒋玉平 辛彬[2] LI Xin;PAN Na;DENG Juan;CHENG Xin;JIANG Yuping;XIN Bin(AECC Chengdu Engine Co.,Ltd.,Chengdu 610503,China;School of Optoelectronics Engineering,Xi’an Technological University,Xi’an 710021,China)

机构地区：[1]中国航发成都发动机有限公司,四川成都610503 [2]西安工业大学光电工程学院,陕西西安710021

出　　处：《新技术新工艺》2025年第2期37-43,共7页New Technology & New Process

摘　　要：通过对GH2787合金材料表面进行等离子体电化学抛光试验,分别利用光学显微镜、X射线衍射仪(XRD)和电化学极化曲线测量技术对其表面形貌、相结构、残余应力和耐蚀性进行了表征。结果发现:在电解液浓度ω=5%、加热温度T=80℃、抛光时间t=5 min、电压U=260、280和300 V条件下,等离子体电化学抛光可快速将表面粗糙度Ra从530 nm降低至63.8 nm,基体表面未产生新的物相,并且残余应力、近表面硬度与初始状态相当,基体耐蚀性提高。该抛光方法为表面改性提供了良好基础,分析了电压对抛光效果和基体材质的影响:电压较低时,对材料去除速率较慢,升高至300 V时,基体材料吸氢增加且腐蚀速率未进一步提升。本试验采用的最佳抛光参数:U=280 V,ω=5%,T=80℃,t=5 min。Through plasma electrochemical polishing tests on the surface of GH2787 alloy materials,the surface morphology,phase structure,residual stress and corrosion resistance were characterized respectively by optical microscope,X-ray diffractometer(XRD)and electrochemical polarization curve measurement technology.The results showed that under the conditions of plasma electrochemical polishing electrolyte concentrationω=5%,heating temperature T=80℃,polishing time t=5 min,and the voltage U=260,280,and 300 V,the surface roughness Ra was rapidly reduced from 530 nm to 63.8 nm.No new phases generated on the substrate surface,and the residual stress and near-surface hardness were equivalent to the initial state.The corrosion resistance of the substrate was improved.This polishing method provided a good foundation for surface modification,and the influence of voltage on polishing effect and substrate material was analyzed.When the voltage was low,the material removal rate was slow.When it was increased to 300 V,the hydrogen absorption of the substrate material increased and the corrosion rate did not further increase.The optimal polishing parameters used in this experiment were U=280 V,ω=5%,T=80℃,and t=5 min.

关 键 词：等离子体电化学抛光 表面粗糙度 氢含量 变形高温合金 抛光参数 耐蚀性 

分 类 号：TG175[金属学及工艺—金属表面处理] TH162[金属学及工艺—金属学] TP206.1[机械工程—机械制造及自动化]