Effect of oscillation modes on weld formation and pores of laser welding in the horizontal position

被引：23
作者：
Wu, Manpeng [1 ,2 ]
Luo, Zhen [1 ]
Li, Yang [2 ]
Liu, Lihua [2 ]
Ao, Sansan [1 ,3 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
[2] Bohai Shipyard Grp Co Ltd, Huludao 125004, Peoples R China
[3] Cent South Univ, State Key Lab High Performance Complex Mfg, Changsha 410083, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2023年 / 158卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Oscillation mode; Weld formation; Pore; High-strength low alloy steel; STEEL; MICROSTRUCTURE; MECHANISMS; POROSITY;
D O I：
10.1016/j.optlastec.2022.108801
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The present paper systematically investigated the effect of oscillation modes on weld formation and pores of laser welding for high-strength low alloy (HSLA) steel in the horizontal position. The laser energy distributions with different oscillation modes were calculated and analyzed. The vapor plume, the molten pool characteristic, and the keyhole behavior with different oscillation modes were observed. The experimental results show that compared with non-oscillation laser welding and lateral oscillation laser welding, circular oscillation laser welding has more uniform energy distribution, less fluctuation of laser spot motion velocity, and more stable plume and keyhole. Circular oscillation laser welding decreases the depth-to-width ratio of the welds, reduces welding spatters, and improves weld formation. Circular oscillation of the laser beam increases keyhole size, and the oscillation keyhole formed is more likely to trap the bubbles in the molten pool, thus reducing the probability of pore formation. Finally, circular oscillation laser welding with an oscillation amplitude of 4 mm and an oscillation frequency of 60 Hz obtains high-quality weld with expected morphology and free of pores.
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页数：10
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