摘要
设备器件精密化、微型化是工业发展的重要趋势。在航空航天、动力电池、消费电子、生物医疗等应用领域中,零部件的日益微型化对微加工工艺提出了更高的要求。金属材料微焊接是微加工领域的重要需求之一,而激光具有能量密度高、热输入精确可控、焊接变形小等特点,是金属材料微焊接的重要技术手段。对金属材料激光微焊接技术展开了探讨,明确了其内涵,阐明了微尺度效应的影响,并总结了激光微焊接常见的缺陷及其质量控制方法,介绍了同种金属材料和异种金属材料激光微焊接的重要应用前景。最后,指出了金属材料激光微焊接技术存在的问题,并展望了未来的发展方向。
Significance In recent years,notable progress has been made in the development of equipment components aimed at precision and miniaturization.These miniature components typically exhibit complex geometries.They are composed of diverse materials.Further miniaturization of these components has led to an increased demand for precision welding.Consequently,the assembly of small parts and the packaging of devices require increasingly high levels of connection accuracy and quality control.High-quality micro-welding technologies for metallic materials have important applications in aerospace,power batteries,biomedicine,and other fields.For instance,micro electro mechanical systems(MEMS),characterized by feature sizes ranging from 1μm to 1 mm,are commonly packaged using micro-welding technology.Moreover,power battery electrode foils,with thicknesses as low as 6‒12μm,require precise connections for current export.Furthermore,the assembly of components and metal shell sealing in implantable biomedical devices rely heavily on micro-welding technology.Common micro-welding techniques include resistance micro spot welding,ultrasonic micro-welding,micro tungsten inert gas(TIG)welding,and laser micro-welding.Compared with conventional micro-welding methods,laser micro-welding offers several advantages,including a small focusing spot size,precise heat input control capability,high welding speed,and compatibility with various weldable materials.Progress This study investigates the laser micro-welding technology of metal materials,providing a comprehensive analysis of its significance,microscale effects,welding modes,laser selection,and defect and quality control measures.It is difficult to reach a consensus on a precise definition of laser micro-welding.The connotations of laser micro-welding are comprehensively summarized based on previously reported studies.Strictly speaking,laser micro-welding pertains to a laser welding process where at least one feature size of the connected material or weld is less than 100μm.Laser micr
作者
杜伟哲
黄旭霆
郑敏
肖荣诗
黄婷
Du Weizhe;Huang Xuting;Zheng Min;Xiao Rongshi;Huang Ting(Intelligent Photon Manufacturing Research Center,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2024年第4期60-76,共17页
Chinese Journal of Lasers
基金
北京市教委科技计划重点项目(23JC0003)
国家重点研发计划(2017YFB1104803)。
关键词
激光技术
金属箔材
激光微焊接
尺度效应
工艺参数
应用
laser technique
metal foil
laser micro welding
scale effect
process parameters
application
