激光辅助射流电化学抛光GH3044合金实验研究  

Experimental Study of Laser-Assisted Jet Electrochemical Polishing of GH3044 Alloy

作　　者：吴国龙 沈杰 黄煜杰 杨珍珍 王晔 田懿 姚建华 Wu Guolong;Shen Jie;Huang Yujie;Yang Zhenzhen;Wang Ye;Tian Yi;Yao Jianhua(Institute of Laser Advanced Manufacturing,Zhejiang University of Technology,Hangzhou 310023,Zhejiang,China;Collaborative Innovation Center of High-End Laser Manufacturing Equipment,Hangzhou 310023,Zhejiang,China;College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310023,Zhejiang,China;China Academy of Engineering Physics,Mianyang 621000,Sichuan,China)

机构地区：[1]浙江工业大学激光先进制造研究院,浙江杭州310023 [2]高端激光制造装备省部共建协同创新中心,浙江杭州310023 [3]浙江工业大学机械工程学院,浙江杭州310023 [4]中国工程物理研究院,四川绵阳621000

出　　处：《中国激光》2024年第20期117-127,共11页Chinese Journal of Lasers

基　　金：国家自然科学基金(U2130122,U22A20199);装备预研教育部联合基金(8091B022215);浙江省基础公益项目(LGJ22E050002);中国博士后科学基金面上项目(2023M733147)。

摘　　要：为了满足工程应用对GH3044合金高质量表面的需求,采用激光辅助射流电化学抛光工艺改善其表面质量,研究了不同激光功率对点加工形貌的影响规律,探究了不同扫描次数对线扫描加工形貌和粗糙度的影响,在此基础上实现了样品表面镜面级的抛光。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、X射线光电子能谱仪(XPS)以及电子背散射衍射(EBSD)等分析方法对抛光前后的试样表面进行了表征,研究了表面微观形貌、物相与元素组成的变化。结果表明:相较于单一射流电化学抛光,激光辅助射流电化学抛光后的表面精度更高,未发现W化合物等聚集,样品表面粗糙度下降至130 nm;抛光前后样品表面的物相种类未发生改变,晶粒平均尺寸基本保持不变;经过激光辅助射流电化学抛光后,样品表面Ni、W及其氧化物含量下降,Cr及其氧化物含量上升。激光辅助射流电化学抛光工艺利用激光的高能量特性,通过加快电子传输速率,加速钝化膜的溶解过程,并促进难溶化合物的溶解,从而实现对GH3044合金表面的高质量和高效率抛光。Objective The GH3044 alloy is promising for diverse aerospace applications because of its exceptional physicochemical properties.However,inherent surface defects,such as elevated roughness and oxidized layers,are incurred during processing and manufacturing.These defects significantly compromise the reliability and durability of the resulting products,thereby constraining their scope of application.This study introduces a laser-assisted jet electrochemical polishing method that integrates laser polishing and electrochemical jet polishing to leverage the synergies of both techniques to achieve high-quality and efficient polishing of the GH3044 alloy.The primary objective of this study is to experimentally polish the surface of a GH3044 alloy using laser-assisted jet electrochemical polishing technology and to explore the impacts of different process parameters(laser power and scanning time)on the surface roughness.Concurrently,a detailed analysis of the surface morphology,microstructure,and phase changes of the polished samples is conducted.This investigation aims to offer novel insights and empirical support for the implementation of laser-assisted jet electrochemical polishing technology on sizable high-temperature alloy workpieces to ultimately enhance the workpiece surface quality and extend the operational lifespan.Methods In this study,the surface of the GH3044 alloy,which possesses an original roughness of 680 nm,is subjected to preliminary spot polishing and subsequent line-scan polishing.By employing laser confocal technology,a comprehensive analysis of the three-dimensional morphology,depth,and roughness is conducted.The primary objectives are to examine the influence of laser parameters on the surface morphology and roughness and to explore the impact of varying the scanning times during line scanning processing.This study aims to identify the optimal polishing parameters.Subsequently,the substrate surface is scanned and polished at the optimized scanning speed.Surface characterization before and after

关 键 词：激光 射流电化学抛光 GH3044合金 粗糙度 表面形貌 

分 类 号：TG175[金属学及工艺—金属表面处理]