激光增材制造光致等离子体光谱分析  

Spectral Analysis of Laser Induced Plasma in Laser Additive Manufacturing

作　　者：姚永臻 陈波[1,2] 檀财旺[1,2] 冯吉才[1,2] Yao Yongzhen Chen Bo Tan Caiwang Feng Jicai(Key Laboratory of Advanced Welding and Joining, Weihai, Shandong 264209, China State Key Laboratory of Advanced Welding and Joining, Harbin, Heilongjiang 150001, China)

机构地区：[1]哈尔滨工业大学(威海)山东省特种焊接技术重点实验室,山东威海264209 [2]哈尔滨工业大学先进焊接与连接国家重点实验室,黑龙江哈尔滨150001

出　　处：《应用激光》2017年第3期346-350,共5页Applied Laser

摘　　要：在激光增材制造过程中,光致等离子体的辐射强度、温度及电子密度对入射激光能量的传输效率及增材的成形质量、组织性能都有很大影响,对光致等离子体进行分析具有重要意义。使用光纤光谱仪建立了同轴送粉金属直接沉积的光谱采集系统,采用光谱诊断分析方法对不同工艺参数下的等离子体温度和电子密度进行计算,得出激光增材制造过程中不同实验条件下,激光功率、送粉量、扫描速度以及增材层数等参量对等离子体的辐射强度、温度及电子密度间的影响规律。通过本文的研究,有助于理解激光增材制造过程光致等离子体形成机理及影响因素,为实现激光增材制造过程质量自动控制打下基础。In the process of laser additive manufacturing,the radiation intensity,temperature and the electron density of the plasma have great influences on transmission efficiency of laser energy,forming quality and structure property.In this paper,spectrum acquisition system for coaxial power direct metal deposition was established by using fiber optic spectrometer,and spectrum analysis methods were used to calculate plasma temperature and electron density under different process parameters.The relationships between laser power,feeding rate,scanning speed,and cladding layers and the radiation intensity,temperature,electron intensity of the plasma were found.The findings of the paper will be helpful to understand the formative mechanism and influencing factors of laser induced plasma during laser additive manufacturing,and lay the foundations for automatic quality control of laser additive manufacturing process.

关 键 词：激光增材制造 光致等离子体 光谱分析 影响规律 

分 类 号：TN249[电子电信—物理电子学]