A study of thick plate ultra-narrow-gap multi-pass multi-layer laser welding technology combined with laser cleaning

Li, Ruoyang; Yue, Jun; Shao, Xinyu; Wang, Chunming; Yan, Fengyuan; Hu, Xiyuan

doi:10.1007/s00170-015-7193-0

Cited by 18 publications

(2 citation statements)

References 16 publications

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“…In order to achieve laser removal of polyurethane coatings, a moving speed along the Z direction is added to the top surface of the grid as the removal speed [25], as shown in Equation ( 7) below [26]:…”

Section: Thermal Modelingmentioning

confidence: 99%

Multi-Perspective Evaluations of Laser-Removal Quality of Acrylic Polyurethane Coatings on Aluminum Alloy Substrate

Huang

Shen

et al. 2023

Coatings

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Evaluation systems for objects after laser removal have not been systematically established, yet they have great significance for repairing engineering coating materials. In general, this paper mainly focused on the surface quality after laser removal, which was simulated by thermal models and characterized by microscopic, residual chemical compositions, and wettability. The laser removal threshold was considered to be a key indicator to regulate removal precision. Here, the thermal model was used to explore the threshold was 15 J/cm2, and the ablation P was 308 W at 100 kHz. Besides, the surface structure was observed through simulation before experiments. It also predicted the effect of laser power and overlapping on surface roughness, and therefore provided the theoretical reference for experiments. Then, two groups of samples were set up of the surface of acrylic polyurethane coatings on 2024 aluminum alloy with and without anodizing treatment, respectively. After the coatings were removed, microscopic morphologies demonstrated a wavy undulation structure with little residue. Meanwhile, the increments of roughness were less than 0.5 μm and the surfaces were with nice wettability. Evaluating the surface quality from the above aspects is meaningful and helpful for the non-destructive cleaning of aircraft skin coatings.

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Section: Thermal Modelingmentioning

confidence: 99%

Multi-Perspective Evaluations of Laser-Removal Quality of Acrylic Polyurethane Coatings on Aluminum Alloy Substrate

Huang

Shen

et al. 2023

Coatings

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“…A low threshold thermal-chemical impact ablation mechanism of the film can be implemented under the effect of pulsed laser radiation with power density lower than 10 7 W/cm 2 [12,14] ( Figure 1(b)). Laser cleaning technique has been successfully applied to removal of paint and oxide layer on metal surfaces, cleaning of optical and electronic elements, and conservation of cultural heritage [15][16][17][18][19][20][21][22]. However, few research studies have been carried out on laser cleaning of ductile iron.…”

Section: Introductionmentioning

confidence: 99%

Cleaning of Graphite Particles Embedded in the Surface of Ductile Iron by Using a Novel Method

Jia

Miao

Jiang

et al. 2021

Mathematical Problems in Engineering

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Ductile iron has unique mechanical property and has been widely used in many industrial applications, e.g., engine cylinder covers, crank axles, and machine tool beds and cams. The welding performance of ductile iron is normally influenced by graphite particles in the surface of ductile iron, which needs to be removed before welding. In this article, laser cleaning technique was developed to remove graphite particles implanted in the surface of ductile iron. Laser cleaning parameters and the damage threshold value of the substrate were investigated by using a pulsed Nd: YAG laser. The optimized laser cleaning parameters were obtained to achieve high-quality cleaning effect and avoid the formation of the oxide layer. Surface morphologies and elemental compositions of specimens before and after laser cleaning were characterized by scanning electron microscopy and energy-dispersive X-ray spectroscopy. Results indicated that graphite particles implanted in the surface of ductile iron were removed completely and efficiently by using the pulsed laser without the protection of inert gas atmosphere, and surface oxidation was not observed during the laser cleaning process.

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Parameter optimization of multi-pass multi-layer MIG welded joint for invar alloy

Zhan

Liu

Chen

et al. 2016

Int J Adv Manuf Technol

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A study of thick plate ultra-narrow-gap multi-pass multi-layer laser welding technology combined with laser cleaning

Cited by 18 publications

References 16 publications

Multi-Perspective Evaluations of Laser-Removal Quality of Acrylic Polyurethane Coatings on Aluminum Alloy Substrate

Multi-Perspective Evaluations of Laser-Removal Quality of Acrylic Polyurethane Coatings on Aluminum Alloy Substrate

Cleaning of Graphite Particles Embedded in the Surface of Ductile Iron by Using a Novel Method

Parameter optimization of multi-pass multi-layer MIG welded joint for invar alloy

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