Experimental Study of the Diffusion Process of Pulsed-GMAW Plasma with Optical Emission Spectrometry
LI Min1,2, ZHANG Wang1,2, CAO Lan1, HUA Xue-ming2,3, LI Fang2,3, PAN Cheng-gang2
1. Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai University of Electric Power, Shanghai 200093, China 2. Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai Jiaotong University, Shanghai 200240, China 3. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China
Abstract：In case of GMAW-P application, the product quality is strongly dependent on the arc plasma performances. Therefore, in order to improve the application, it is important to understand and characterize the fundamental plasma properties. In this paper, different techniques (high speed camera ，optical emission spectroscopy system, electrical data acquisition system, synchronous triggering device) were used to characterize the arc characteristic. The metal diffusion process from the peak time to the base time is discussed, as well as its physical characteristics. The results show that, in the peak time phase, a high concentration of metal vapor arc is concentrated in the plasma center of the range of about 1 mm, during the transition from the peak to the base pulse periods, the diffusion leads to an iron vapor flux from regions in the arc core to the arc fringes. The iron mol fraction of the peak time was up to 75%, only taking up 35% of the base time.
李 敏1,2，张 旺1,2*，曹 岚1，华学明2,3，李 芳2,3，潘成刚2 . 基于光谱诊断的脉冲GMAW焊金属蒸汽动态扩散行为研究 [J]. 光谱学与光谱分析, 2017, 37(02): 527-531.
LI Min1,2, ZHANG Wang1,2, CAO Lan1, HUA Xue-ming2,3, LI Fang2,3, PAN Cheng-gang2 . Experimental Study of the Diffusion Process of Pulsed-GMAW Plasma with Optical Emission Spectrometry . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(02): 527-531.
