Effects of Welding Parameters on Droplet Transfer and Bead Geometry in Laser Welding with Aluminum and Stainless Steel Filler Wires알루미늄 및 스테인리스 스틸 와이어를 사용하는 레이저 용접에서 용융 금속 이행 및 비드 형상에 미치는 용접 매개변수의 영향
- Other Titles
- 알루미늄 및 스테인리스 스틸 와이어를 사용하는 레이저 용접에서 용융 금속 이행 및 비드 형상에 미치는 용접 매개변수의 영향
- Authors
- Shin, Joonghyeon; Lee, Seung Hwan; Kang, Minjung
- Issue Date
- Oct-2023
- Publisher
- 대한용접접합학회
- Keywords
- Laser welding with filler wire; Droplet transfer; Bead geometry; Plasma/plume; Force
- Citation
- 대한용접접합학회지, v.41, no.5, pp.342 - 348
- Indexed
- KCI
- Journal Title
- 대한용접접합학회지
- Volume
- 41
- Number
- 5
- Start Page
- 342
- End Page
- 348
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/192123
- DOI
- 10.5781/JWJ.2023.41.5.4
- ISSN
- 2466-2232
- Abstract
- Laser welding is increasingly used in industries because it allows high production cycle time and single-sided welding, but is characterized by a high sensitivity to joint preparation. By inserting filler wires, the sensitivity to joint preparation can be suppressed. In this study, the effect of welding variables on the bead geometry and melted droplet transfer were investigated. Two wires with different thermal diffusivities and densities were selected: stainless steel (STS) and aluminum (Al) wires. According to the wire feeding angle, the melting area tended to differ between the STS and Al wires. This implied that the wire feeding angle had to consider the absorption rate of the material for the laser wavelength. With an increase in the distance between the wire tip and the substrate, the dominant force acting on the droplet was changed from surface tension to gravity. Therefore, the distance was considered as a major factor in determining the droplet transfer mode. In all cases, the droplet transfer period exhibited relatively small deviation when the wire feeding direction was leading. Furthermore, the focal length effects on droplet transfer were irrelevant.
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