Effects of Shielding Gas Parameters on Droplet Transfer and Bead Profile Prepared by CO2 Laser-MAG Hybrid Welding

被引：0
|
作者：
Liu, S-Y. [1 ]
Shi, Y. [1 ]
Zhang, H. [1 ]
Liu, F-D. [1 ]
Liu, J. [1 ]
机构：
[1] Changchun Univ Sci & Technol, Coll Mech & Elect Engn, Changchun 130022, Peoples R China
来源：
LASERS IN ENGINEERING | 2010年 / 20卷 / 3-4期
关键词：
CO2 laser welding; metal active gas (MAG) welding; shielding gas; high speed video photography; droplet transfer; weld geometry; STEEL; ALLOY; AZ31B;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The variations in arc characteristics, stability of the hybrid welding process and behaviour of the droplet transfer with different shielding gas parameters have been studied by means of high speed video photography during CO2 laser-metal active gas (MAG) hybrid welding of 5 mm thick high strength steel plates with an austenitic stainless steel filler wire. The results indicate that the shielding gas is critical to the process stability, droplet transfer mode and dimensional characteristics of weld bead for when CO2 laser-MAC hybrid welding. The behaviour of the droplet transfer noted by the droplet diameter and detachment velocity was found to he related to gas now rate. When the gas flow rate was increased to a critical value, the hybrid welding characteristic was changed from stable hybrid welding to unstable hybrid welding, and the frequency of droplet transfer decrease and the droplet diameter increase significantly.
引用
收藏
页码：143 / 155
页数：13
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