摘要
铜及铜合金具有优良的导电、导热等特性,3D打印的发展使得青铜合金精密构件在高端制造中的重要性日益突显。本文采用激光粉末床熔融技术在不同扫描速度(200、400、600 mm/s)下制备青铜合金,通过光学显微观察、硬度测试、摩擦实验、三维形貌分析、SEM和EDS表征分析,对其显微结构、力学性能和摩擦学性能展开研究。结果表明:随扫描速度增大,3D打印青铜合金熔覆层孔隙率增大,熔池组织晶粒尺寸减小,晶粒组织更加致密,硬度提高;青铜合金的摩擦学性能提高,摩擦损耗降低。此外,3D打印青铜合金的磨损机制主要为黏着磨损和磨粒磨损,且在较小扫描速度下氧化磨损更严重。
Copper and copper alloy have excellent electrical conduction,heat conduction and other characteristics,the development of 3D printing makes the importance of bronze alloy precision components increasingly prominent in the high-end manufacturing.Bronze alloys were prepared by laser powder bed fusion technique with different scanning speed(200,400,600 mm/s)in this paper,the microstructures,mechanical properties,and tribological properties were studied by optical microscopic observation,hardness test,friction experiment,three-dimensional morphology analysis,SEM and EDS characterization analysis.The results indicate that with the increase of scanning speed,the porosity of 3D printed bronze alloy cladding layer increases,the grain size of molten pool decreases,the grain structure becomes more dense,the hardness increases;tribological property of 3D printed bronze alloy increases and the friction loss decreases.Moreover,the wear mechanism of 3D printed bronze alloy is mainly adhesion wear and abrasive wear,and oxidation wear is more serious under the condition of low scanning speed.
作者
伍强
肖叶龙
沈明学
熊光耀
季德惠
赵火平
WU Qiang;XIAO Yelong;SHEN Mingxue;XIONG Guangyao;JI Dehui;ZHAO Huoping(School of Science,East China Jiaotong University,Nanchang 330013,China;School of Materials Science and Engineering,East China Jiaotong University,Nanchang 330013,China)
出处
《粉末冶金材料科学与工程》
2025年第3期224-232,共9页
Materials Science and Engineering of Powder Metallurgy
基金
江西省自然科学基金资助项目(20242BAB23039)
江西省“双千计划”人才项目(jxsq2023101063)
山区土木工程安全与韧性全国重点实验室自主课题资助项目(HJGZ2024207)
江西省重大科技研发专项(20223AAE02013)
广东省教育厅高端装备制造(智能机器人、新材料)重点领域项目(2024ZDZX3089)。
关键词
扫描速度
3D打印
青铜合金
力学性能
摩擦磨损
scanning speed
3D printing
bronze alloy
mechanical property
friction wear
