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JWJ > Volume 37(5); 2019 > Article
Journal of Welding and Joining 2019 October;37(5) :441-447.
Published online October 17, 2019.
doi:https://doi.org/10.5781/JWJ.2019.37.5.2
A Study on the Effect of Overlap Rate on Laser Beam Cleaning Characteristics while Cleaning Paint Using a Low Power Pulsed Laser(Ⅱ) - Analysis of Laser Cleaned Surface Characteristics for Various Pulse Overlap Rates -
Ji-Eon Kim1  , Moo-Keun Song2  , Jong-Myoung Lee3  , Jeong-Hun Hyun4  , Jong-Do Kim5 
1Ocean Science and Technology School, Korea Maritime & Ocean Univ., Busan, 49112, Korea
2Laser Advanced Machining Support Center, Korea Maritime & Ocean Univ., Busan, 49112, Korea
3IMT Co., Ltd., Suwon, 16675, Korea
4Daewoo Shipbuilding & Marine Engineering Co., Ltd., Geoje, 53302, Korea
5Division of Marine Engineering, Korea Maritime & Ocean Univ., Busan, 49112, Korea
Correspondence: Jong-Do Kim  Email: jdkim@kmou.ac.kr
Received August 4, 2019  Revised September 4, 2019  Accepted October 8, 2019  Published online October 17, 2019
ABSTRACT
Laser cleaning technologies have been attracting attention as a solution to the environmental problems caused by pre-treatment processes, but there are very few studies on the removal of paint using laser cleaning. In this study, laser cleaning was performed on steel painted with shop primer and epoxy paint using a Q-switching fiber laser, and the characteristics of the laser cleaned surfaces was compared in relation to the pulse overlap rate, as a main parameter. Experimental results showed that the number of scans to remove the paint decreased as the pulse overlap rate increased. At pulse overlap rates of 20 % and 50 %, the oxide layer was not removed from the surface. However, when the pulse overlap rate was increased to 70%, the oxide layer was completely removed. In addition, damage of the base material was reduced when the pulse overlap rate was increased, more precise laser cleaning was possible.
Keywords: Laser cleaning | Q-switching fiber laser | Pulse overlap rate
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A Study on the Effect of Overlap Rate on Laser Beam Cleaning Characteristics while Cleaning Paint Using a Low Power Pulsed Laser(Ⅰ) - Analysis of Laser Cleaned Surface Characteristics Based on Number of Scans -  2019 October;37(5)
A Study on the Effect of Overlap Rate on Laser Beam Cleaning Characteristics while Cleaning Paint Using a Low Power Pulsed Laser(Ⅰ) - Analysis of Laser Cleaned Surface Characteristics Based on Number of Scans -  2019 October;37(5)
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