Effect of laser power on cleaning mechanism and surface properties

Zhuang Wan; Xuefeng Yang; Guofeng Xia; Dan Li; Wenbo Liu; Jian Cheng; Shouren Wang

doi:10.1364/AO.399691

Applied Optics
Vol. 59,
Issue 30,
pp. 9482-9490
(2020)
•https://doi.org/10.1364/AO.399691

Effect of laser power on cleaning mechanism and surface properties

Zhuang Wan, Xuefeng Yang, Guofeng Xia, Dan Li, Wenbo Liu, Jian Cheng, and Shouren Wang

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Zhuang Wan, Xuefeng Yang, Guofeng Xia, Dan Li, Wenbo Liu, Jian Cheng, and Shouren Wang, "Effect of laser power on cleaning mechanism and surface properties," Appl. Opt. 59, 9482-9490 (2020)

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Table of Contents Category
- Lasers, Optical Amplifiers, and Laser Optics
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About this Article
History
- Original Manuscript: June 8, 2020
- Revised Manuscript: September 28, 2020
- Manuscript Accepted: September 29, 2020
- Published: October 19, 2020

Abstract

In this paper, the mechanism of laser dry cleaning was introduced, and the influence of different power on laser cleaning effect and surface performance after cleaning were investigated. The cleaning effect of 60–120 W cleaning power on the oxidized layer of a Q235 surface was analyzed by experiment and simulation. The results showed that the cleaning power of 70 W makes the surface performance after cleaning of the samples relatively optimized. The best cleaning power is 90 W. The sample surface of 100 W is the smoothest, but it causes slight damage to the matrix. The cleaning power of 120 W has the maximum friction coefficient, but it has the maximum damage to the matrix.

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Clean Things	Laser	Parameter
Oxidized and rust removal	Nd•YAG laser (q switching)	Power was 1500 W; Wavelength of 1064 nm; Spot diameter 140 µm; Frequency of 360 Hz The scanning speed was 10 mm/s; Pulse time 10 ns Auxiliary gas pressure was 0.5 Mpa
Nuclear facilities	Nd•YAG laser (q switching)	Wavelength of 1064 nm; Pulse width 100 ps Power was 13 W; The focal length of 2.5 mm Sweep speed was 10 mm/s
Oil residue	Nd•YAG laser (q switching)	Wavelength of 1064 nm; Pulse width 100 ps Wavelength of 10 nm; Duration: 6 ns Spot diameter 9 nm; Frequency of 10 Hz
Marine steel plate before welding paint	Fiber laser	Wavelength of 1064 nm; Wavelength of 30 nm Spot diameter 100 µm; Pulse width 50 ns Power 30 W
Mould	Carbon oxidized laser	Power was 80 W, Pulse frequency 10 Hz The speed was 5 mm/s

Physical Parameters	Q235	Oxidized
$k / (W \cdot m^{- 1} \cdot K^{- 1})$	61.5	55
$c / (J \cdot k g^{- 1} \cdot K^{- 1})$	$0.54 \times 1 0^{3}$	$0.67 \times 1 0^{3}$
$ρ / (K g \cdot m^{- 3})$	$7.85 \times 1 0^{3}$	$5.24 \times 1 0^{3}$
$R$	0.3	0.8
$α / (m^{- 1})$	$4.19 \times 1 0^{7}$	$5.5 \times 1 0^{4}$

Power	Removal Total Quality (g)	Vaporization (g)	Ablation Removal Proportion
60 W	0.018	0.011	0.611111
70 W	0.027	0.019	0.703704
80 W	0.025	0.019	0.76
90 W	0.026	0.021	0.807692
100 W	0.028	0.024	0.892857
120 W	0.031	0.028	0.903226

Clean Things	Laser	Parameter
Oxidized and rust removal	Nd•YAG laser (q switching)	Power was 1500 W; Wavelength of 1064 nm; Spot diameter 140 µm; Frequency of 360 Hz The scanning speed was 10 mm/s; Pulse time 10 ns Auxiliary gas pressure was 0.5 Mpa
Nuclear facilities	Nd•YAG laser (q switching)	Wavelength of 1064 nm; Pulse width 100 ps Power was 13 W; The focal length of 2.5 mm Sweep speed was 10 mm/s
Oil residue	Nd•YAG laser (q switching)	Wavelength of 1064 nm; Pulse width 100 ps Wavelength of 10 nm; Duration: 6 ns Spot diameter 9 nm; Frequency of 10 Hz
Marine steel plate before welding paint	Fiber laser	Wavelength of 1064 nm; Wavelength of 30 nm Spot diameter 100 µm; Pulse width 50 ns Power 30 W
Mould	Carbon oxidized laser	Power was 80 W, Pulse frequency 10 Hz The speed was 5 mm/s

Physical Parameters	Q235	Oxidized
$k / (W \cdot m^{- 1} \cdot K^{- 1})$	61.5	55
$c / (J \cdot k g^{- 1} \cdot K^{- 1})$	$0.54 \times 1 0^{3}$	$0.67 \times 1 0^{3}$
$ρ / (K g \cdot m^{- 3})$	$7.85 \times 1 0^{3}$	$5.24 \times 1 0^{3}$
$R$	0.3	0.8
$α / (m^{- 1})$	$4.19 \times 1 0^{7}$	$5.5 \times 1 0^{4}$

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Applied Optics