电焊机2017，Vol.47Issue(8)：9-14,6.DOI:10.7512/j.issn.1001-2303.2017.08.02
焊丝直径和保护气体对GMAW熔滴过渡形态的影响
Effect of electrode diameters and shielding gases on droplet transfer form in GMAW
孙咸1
作者信息
- 1. 太原理工大学焊接材料研究所,山西太原030024
- 折叠
摘要
Abstract
In this paper,a new discovery of the influence of electrode diameter and shielding gas on the GMAW droplet transfer was reviewed.The results show that the average droplet diameters do not become smaller than the electrode diameters after the transition current,for the electrode with less than 0.90 mm diameter.As the electrode diameter decreases,the critical current shows a decreasing trend,but the trend of this kind of change is not detected in the superfine electrode.For with diameter less than 0.90 mm,transition does not occur when the current increases,because the electrode diameter can not change the anode spot area obviously,arc can not climb up the molten droplets.The effect of CO2 on the transition of the droplet transfer in the fine electrode does not follow the normal electrode transfer mode that the transition current is increased as the CO2 content increases.Repelled transfer is dominant with shielding gas compositions containing more than 30％ CO2 regardless of electrode diameter.关键词
熔滴过渡形态/焊丝直径/保护气体/GMAW/转变电流Key words
droplet transfer form/electrode diameter/shielding gas/gas metal arc welding/transition current分类
矿业与冶金引用本文复制引用
孙咸..焊丝直径和保护气体对GMAW熔滴过渡形态的影响[J].电焊机,2017,47(8):9-14,6.
