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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 laser additive manufacturing process, the radiative intensity, temperature and electron density of the photoplethysmography have a great influence on the transmission efficiency of the incident laser energy, the forming quality of the added material and the microstructure and properties. The analysis of the photoplethysmography Significance. Using optical fiber spectrometer to establish the coaxial acquisition system of powder metallurgy direct deposition, using spectral diagnostic analysis method to calculate the plasma temperature and electron density under different process parameters, obtained the laser additive manufacturing process under different experimental conditions, Laser power, powder feeding rate, scanning speed and the number of additional layers and other parameters on the plasma radiation intensity, temperature and electron density between the rules. Through the research of this paper, it is helpful to understand the formation mechanism and influencing factors of photoplasma in laser additive manufacturing process and lay the foundation for automatic quality control of laser additive manufacturing process.