Experimental Study of Neutral Salt Solution Assisted Laser Machining

Hua, 张华 Zhang; Jiawen, 徐家文 Xu; Jiming, 王吉明 Wang

doi:10.3788/cjl20083511.1836

Cited by 4 publications

(4 citation statements)

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“…Compared with pure water, the attenuation coefficient of a laser in a NaCl solution was higher. The change in salt solution concentration had a significant impact on the removal of the recast layer, while the change in flow rate mainly influenced the reduction in the heat-affected zone [23].…”

Section: Introductionmentioning

confidence: 99%

Improving the Quality of Laser Drilling by Assisted Process Methods of Static Solution and Mist Blowing

Tao,

Wang,

et al. 2024

Micromachines

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The use of static solution-assisted laser drilling can effectively improve hole roundness, decrease taper angle, and reduce recast layer thickness and hole wall slag adhesion. However, the enormous energy of the laser will evaporate the solution to form a suspension droplet and reduce the quality and efficiency of laser drilling. To deal with this defect, the mist-blowing method was used to reduce the influence of droplets on the taper angle and recast layer. In this work, the effect of wind speed on drilling quality was examined, and laser drilling in air, water, and NaCl solution was carried out to analyse the effect of solution composition on hole wall morphology. The results showed that a speed fan with a proper wind speed that disperses the droplets formed in the processing area can significantly reduce the refraction and scattering of the laser, and the taper angle and roundness of the drilling hole were also reduced by 15.6% and improved by 2.4%, respectively, under the wind speed of 2 m/s. The hole wall morphology showed a thicker recast layer and cracking in air, while it was thinner in water and there was little or no layer in the NaCl solution in the same current. When drilling in NaCl, the taper angle and roundness of the drilling hole were reduced by 4.13% and improved by 2.11%, respectively, compared to water. Due to the mechanical effect of the laser in the NaCl solution, the impact force on the material was much greater than that in water. The solution cavitation effect, generated by the absorption of laser energy, caused an explosive impact on the molten material adhered to the surface of the hole wall. Above all, drilling in the NaCl solution with a current of 200 A and a wind speed of 2 m/s was the optimal condition for obtaining the best processing quality.

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Section: Introductionmentioning

confidence: 99%

Improving the Quality of Laser Drilling by Assisted Process Methods of Static Solution and Mist Blowing

Tao,

Wang,

et al. 2024

Micromachines

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“…Liquid-phase assisted laser technology has received much attention in recent years due to its high efficiency and low damage to substrate properties. The environmental media for liquid-phase assisted lasers include water [19], salt solutions [20], and alcoholic organics [21].…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al [19] used a pretreatment method of laser cleaning and laser texturing to replace the traditional pretreatment technology of electrodeposition and found that this method could improve the mechanical properties of coatings. Zhang et al [20] found that a neutral salt bath liquid-assisted laser technique could remove defects in the recast layer and heat-affected zone during machining. Garcia-Giron et al [21] performed liquid-assisted laser machining of ceramic and glass vitrified urn materials in water and glycol environments using nanosecond pulse-shot lasers and found that the liquid-phase medium avoided thermal damage and alteration of material properties in the area around the machining of the material.…”

Section: Introductionmentioning

confidence: 99%

Research on the manufacturing of nickel coatings by jet electrodeposition after laser pretreatment with different media

Jiang,

Cheng,

Zhai

et al. 2024

Surf. Topogr.: Metrol. Prop.

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This study aims to address the corrosion issues faced by 45 steel to meet its usage requirements and propose a method combining liquid-phase assisted laser and jet electrodeposition. In this method, the sample surface was the first laser pretreated in different media, and then Ni was deposited on its surface using jet electrodeposition. This paper investigates in detail the effects of laser pretreatment on the surface quality of nickel coating after jet electrodeposition in four different media (Air, Water, Saturated NaHCO3, 95%C2H5OH+5%H2O2). The experimental results indicate that liquid-phase assisted laser pretreatment had improved the surface quality of Ni coating. Especially after laser pretreatment in saturated NaHCO3 medium, the adhesion of the deposited coating increased by 50% compared to air, and the roughness decreased from 20.945 μm in the air to 0.373 μm. The corrosion current density decreased from 120.2 μA·cm-2 on the substrate to 1.605 μA·cm-2.

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“…Laser processing in neutral solution provides a solution to some of the problems of laser machining in air and the other gases [3][4]. The new method can be added on purpose to gain better results: to avoid redeposition of debris, to cool the material, or to increase plasma pressure [5].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Effects during Pulsed Laser and Metals Interaction in Neutral Solution

Zhang

Zhao

et al. 2011

KEM

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In order to investigate the mechanical effects during pulsed laser and metal target in neutral solution, a measuring part of stainless cantilever was developed. The vibration of the stainless cantilever was tested and analyzed based on the test mechanism of piezoelectric accelerometer. The impact pressure of the target in NaNO3 solution by pulsed lasers at wavelength of 532nm and 1064nm with millisecond pulse duration were obtained by the test with the measuring part. The results show that mechanical effect during pulsed laser and stainless target interaction in neutral solution is more than three times higher than in air. The pressure of the target with infrared laser is decreased with the distance of laser propagation in neutral solution. However, the effect with green laser is stable in the laser transmission range of 20mm. The green laser is more suitable for processing under neutral solution.

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Experimental Study of Neutral Salt Solution Assisted Laser Machining

Cited by 4 publications

References 0 publications

Improving the Quality of Laser Drilling by Assisted Process Methods of Static Solution and Mist Blowing

Improving the Quality of Laser Drilling by Assisted Process Methods of Static Solution and Mist Blowing

Research on the manufacturing of nickel coatings by jet electrodeposition after laser pretreatment with different media

Mechanical Effects during Pulsed Laser and Metals Interaction in Neutral Solution

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