Study and development of 22kW peak power fiber coupled short pulse Nd:YAG laser for cleaning applications

Choubey, Ambar; Vishwakarma, S.C.; Vachhani, Dipen M.; Singh, Ravindra; Misra, Pushkar; Jain, R. K.; Arya, Rajesh; Upadhyaya, B.N.; Oak, S. M.

doi:10.1016/j.optlaseng.2014.04.012

Cited by 14 publications

(2 citation statements)

References 25 publications

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“…Wang et al studied the effect of laser parameters on the cleaning and performance of A3 steel, improving the microhardness and corrosion resistance of the cleaned surfaces by increasing of the laser fluence [10]. Choubey et al used a microsecond pulse duration and a high peak power laser to clean a variety of metals for conservation, and found that the cleaning efficiency of Inconel materials can reach 98% [11]. Actually, an Nd:YAG laser has a higher output peak power compared to a fiber or TEA CO 2 laser, and with the rapid development of laser technology, the surface flatness of materials to be cleaned by laser cleaning technology has been studied most in depth [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Surface Integrity of Q345 Steel After Nd:YAG Laser Cleaning of Oxidized Mining Parts

Wang

et al. 2020

Coatings

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As a common mechanical material for mining machinery, Q345 is prone to oxidation due to the moist working environment. At present, laser cleaning is often used to remove rust oxides from the substrate. The pollutant of mining machinery is comprised of a heavy oxide layer and organic ingredients, which are difficult to remove and require high energy per pulse. However, excessive energy is capable of easily destroying surface integrity, such as increasing surface roughness (Ra), generating ablative pits, oxidizing, decreasing microhardness (HV), and decreasing corrosion resistance. Therefore, this paper focused on investigating the surface integrity of mining parts under different laser powers, repetition rates and overlapping rates of the laser spots. The results showed that the surface integrity of the samples gradually improved as the energy per pulse and overlapping rates increased. However, excessive energy caused a negative effect on surface integrity. Based on the comprehensive analysis, optimal parameters were obtained when the power was 280 W, the repetition rate was 10 kHz (pulse duration 84 ns), and the overlapping rate of the laser spot was 70%. This work can provide theoretical guidance for the laser cleaning of mining machinery.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Surface Integrity of Q345 Steel After Nd:YAG Laser Cleaning of Oxidized Mining Parts

Wang

et al. 2020

Coatings

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“…Compared with traditional technology, laser cleaning technology also has great advantages for the protection of cultural relics and efficiently removing the contaminations covered on the surface of the cultural relics [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Investigation of laser cleaning on bronze cultural relics

Ling¹,

Wang²,

Zhang³

2016

Laser Phys.

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The effects of laser cleaning on the corrosion layers of bronze cultural relics were studied using a pulsed fiber laser. The laser cleaning threshold value of the corrosion layers was obtained. It was found that the corrosion layer was removed successfully by employing a laser fluence value of 0.32 J cm−2 and scanning for three times. To obtain experimental evidence, laser con-focal scanning microscopy, scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS), laser induced breakdown spectroscopy (LIBS) and laser Raman spectroscopy were employed to investigate the cleaning efficiency of corrosion layers on specimens.

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