蓝光激光熔覆纯铜覆层的组织及性能  

Microstructure and Properties of the Pure Copper Coating Prepared by Blue Laser Cladding

作　　者：宁晨红 高硕洪 郑江鹏 王枭 杨军红 苏允海[1] 刘敏 闫星辰 NING Chenhong;GAO Shuohong;ZHENG Jiangpeng;WANG Xiao;YANG Junhong;SU Yunhai;LIU Min;YAN Xingchen(School of Material Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;Institute of New Materials,Guangdong Academy of Sciences,National Engineering Laboratory of Modern Materials Surface Engineering Technology,Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology,Guangzhou 510650,China;Guangdong Key and Core Technology Institute,Guangzhou 510700,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870 [2]广东省科学院新材料研究所,现代材料表面工程技术国家工程实验室,广东省现代表面工程技术重点实验室,广州510650 [3]广东粤港澳大湾区硬科技创新研究院,广州510700

出　　处：《材料导报》2024年第17期220-226,共7页Materials Reports

基　　金：广东省科学院建设国内一流研究机构行动专项资金项目(2021GDASYL-20210102005,2022GDASZH-2022010107,2022GDASZH-2022010203-003);广东省特支计划项目(2019BT02C629);广东省基础与应用基础研究基金项目(2020A1515111031,2021A1515010939);中国科协“青年人才托举工程”(YESS20210269);广州市科技计划项目(202007020008,202102020327)。

摘　　要：纯铜材料对红外波段的激光吸收率较低,难以进行传统红外激光熔覆,因此限制了纯铜材料在表面防护领域的应用。本研究采用蓝光激光熔覆技术制备纯铜涂层,通过理论计算结合实验验证获得了其制备工艺参数。随后对纯铜熔覆层的微观组织、显微硬度和摩擦磨损行为进行分析,并结合XRD和EDS研究了蓝光激光熔覆制备的纯铜涂层的元素分布和物相组成。结果表明:采用蓝光激光熔覆技术制备的纯铜材料具有较大的工艺窗口,可获得成形良好的熔覆层。蓝光激光熔覆后,熔覆界面处出现了明显的金属间化合物相NiCu_(4)以及FeCu_(4)。纯铜熔覆层的显微硬度小于基体材料,并且在结合界面存在明显的硬度变化过渡区域,因此涂层和基体之间的稀释区较大。在室温干摩擦磨损条件下,熔覆层的磨损行为以粘着磨损为主,磨粒磨损为辅,并且存在明显的氧化磨损。The low infrared laser absorption of pure copper material limits its traditional application in surface protection through laser cladding.In this study,blue laser cladding technology was employed to prepare pure copper coatings,and process parameters were obtained through theoretical calculations and experimental verification.Subsequently,the microstructure,microhardness,and friction and wear behavior of the pure copper cladding layer were analyzed.In conjunction with XRD and EDS results,the elemental distribution and phase compositions of the cladding layer during blue laser cladding were also studied.Results indicated that the blue laser cladding technology provides a large process window for producing well-formed cladding layers of pure copper.The cladding interface showed a clear presence of intermetallic compounds NiCu_(4) and FeCu_(4).The microhardness of the pure copper cladding layer was found to be lower than that of the substrate material,with a significant hardness transition zone at the bonding interface,indicating a large dilution zone between the coating and substrate.Under dry friction and wear test at room temperature,the cladding layer exhibited good wear resistance,with a mixed mechanism of adhesive and abrasive wear and significant oxidation wear.

关 键 词：激光熔覆 蓝光激光 纯铜 微观组织 力学性能 

分 类 号：TG178[金属学及工艺—金属表面处理] TG174.4[金属学及工艺—金属学]