Energy absorption characteristics in high-power fiber laser welding and active control of plume
- 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.
Cite this article
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 -