Effect of laser spot size on the behavior of molten pool and keyhole in laser welding

Jin Peng; Hongqiao Xu; Yongbiao Wang; Xingxing Wang; Yongzhen Zhang; Weimin Long; Dingyu Zhang

doi:10.3788/IRLA20220130

Journals >Infrared and Laser Engineering >Volume 52 >Issue 7 >Page 20220130 > Article

Infrared and Laser Engineering
Vol. 52, Issue 7, 20220130 (2023)

Effect of laser spot size on the behavior of molten pool and keyhole in laser welding

Jin Peng^1,2,3, Hongqiao Xu¹, Yongbiao Wang⁴, Xingxing Wang¹..., Yongzhen Zhang², Weimin Long³ and Dingyu Zhang¹|Show fewer author(s)

Author Affiliations

¹Henan International Joint Laboratory of High-efficiency Special Green Welding, Material College, North China University of Water Resources and Electric Power, Zhengzhou 450045, China

²National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, China

³China Academy of Machinery Ningbo Academyof Intelligent Machine Tool Co., Ltd., Ningbo 315700, China

⁴Henan Key Laboratory of Mechanical Equipment Intelligent Manufacturing, Zhengzhou Light Industry University, Zhengzhou 450002, China

show less

DOI: 10.3788/IRLA20220130 Cite this Article

Jin Peng, Hongqiao Xu, Yongbiao Wang, Xingxing Wang, Yongzhen Zhang, Weimin Long, Dingyu Zhang. Effect of laser spot size on the behavior of molten pool and keyhole in laser welding[J]. Infrared and Laser Engineering, 2023, 52(7): 20220130 Copy Citation Text

show less

Fig. 1. Calculation domain of laser welding

Download full size | View in the Article

Fig. 2. Three dimensional transient behavior with laser spot radius of 0.1 mm. (a)t ms; (b) t+3.5 ms; (c) t+3.8 ms; (d) t+3.9 ms; (e) t+4.1 ms

Download full size | View in the Article

Fig. 3. Three dimensional transient behavior with laser spot radius of 0.15 mm. (a) tms; (b) t+3.5 ms; (c) t+3.8 ms; (d) t+3.9 ms; (e)t+4.1 ms

Download full size | View in the Article

Fig. 4. Three dimensional transient behavior with laser spot radius of 0.2 mm. (a)t ms; (b) t+3.5 ms; (c) t+3.8 ms; (d) t+3.9 ms; (e) t+4.1 ms

Download full size | View in the Article

Fig. 5. Flow field of molten pool with laser spot radius of 0.1 mm. (a) t ms; (b) t+3.5 ms; (c) t+3.8 ms; (d) t+3.9 ms; (e) t+4.1 ms

Download full size | View in the Article

Fig. 6. Flow field of molten pool with laser spot radius of 0.15 mm. (a) t ms; (b) t+3.5 ms; (c) t+3.8 ms; (d) t+3.9 ms; (e) t+4.1 ms

Download full size | View in the Article

Fig. 7. Flow field of molten pool with laser spot radius of 0.2 mm. (a)t ms; (b) t+3.5 ms; (c)t+3.8 ms; (d) t+3.9 ms; (e) t+4.1 ms

Download full size | View in the Article

Fig. 8. Maximum flow velocity of molten pool under different spot radius

Download full size | View in the Article

Fig. 9. Surface length of molten pool under different spot radius

Download full size | View in the Article

Fig. 10. Schematic diagram of gasification and vapour flow behavior on the wall of the keyhole

Download full size | View in the Article

Fig. 11. Experimental weld pool image and numerical simulation weld pool image

Download full size | View in the Article

Physical quantity	Symbol	Numerical value
Solid density	$ {\rho _s} $	2720
Liquid density	$ {\rho _l} $	2590
Solidus temperature	$ {T_s} $	860
liquidus line emperature	$ {T_L} $	917
Gas line temperature	$ {T_v} $	2740
Latent heat of fusion	$ {L_m} $	$ 3.87 \times {10^{ 5}} $
Latent heat of vaporization	$ {L_v} $	$ 1.08\times{10^{ - 7}} $
Thermal expansion coefficient	$ {\beta _k} $	$ 1.92 \times {10^{ - 5}} $
Heat transfer coefficient	$ {h_c} $	15
Surface tension at 930 K	$ \delta $	0.914
Surface tension gradient coefficient	${\rm{d}}\delta /{\rm{d}}T$	$ - 3.5 \times {10^{ - 4}} $
Emissivity	$ \varepsilon $	0.08
Ambient temperature	$ {T_{ref}} $	300

Table 1. Thermal physical properties of 6056 aluminum alloy

Download Citation

Save the article for my favorites

Paper Information

微信扫一扫：分享

微信扫一扫：分享