Proceedings of the 7th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2024)

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Energy absorption characteristics in high-power fiber laser welding and active control of plume

Authors
Shun Xie1, Jianglin Zou2, 1, *, Baoqi Zhu1, Tao Liu1
1Institute of Laser Engineering, School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing, 100124, China
2Intelligent Photonic Manufacturing Lab, School of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
*Corresponding author. Email: zoujianglin1@163.com
Corresponding Author
Jianglin Zou
Available Online 7 December 2024.
DOI
10.2991/978-94-6463-581-2_77How to use a DOI?
Keywords
Laser welding; Absorption; Plume; Active control; Shielding gas
Abstract

Molten pool and plume are both inherent physical phenomena in high-power fiber laser deep penetration welding. Among them, the molten pool is the main site for optical-thermal energy conversion, while the plume has a significant negative impact on the welding process. In this paper, the conversion and absorption of optical-thermal energy during welding were studied. With the radius of the laser spot decreasing gradually, the total absorptivity of the incident laser of the material first decreases and then increases. In addition, this paper presents a novel idea of micro-beam high-speed shielding gas flow (coaxial double-layer shielding gas nozzle). In this design, the inner layer delivers a micro-beam high-speed shielding gas flow that regulates the formation of plume, while the outer layer supplies a low-speed and wide-range shielding gas flow for shielding the molten pool. This new micro-beam high-speed shielding gas flow can significantly inhibit the formation of plume and spatter, markedly enhances the surface quality of the weld seam, increases the penetration depth of the weld.

Copyright
© 2024 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 7th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2024)
Series
Atlantis Highlights in Material Sciences and Technology
Publication Date
7 December 2024
ISBN
978-94-6463-581-2
ISSN
2590-3217
DOI
10.2991/978-94-6463-581-2_77How to use a DOI?
Copyright
© 2024 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Shun Xie
AU  - Jianglin Zou
AU  - Baoqi Zhu
AU  - Tao Liu
PY  - 2024
DA  - 2024/12/07
TI  - Energy absorption characteristics in high-power fiber laser welding and active control of plume
BT  - Proceedings of the 7th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2024)
PB  - Atlantis Press
SP  - 647
EP  - 652
SN  - 2590-3217
UR  - https://doi.org/10.2991/978-94-6463-581-2_77
DO  - 10.2991/978-94-6463-581-2_77
ID  - Xie2024
ER  -