Analysis of Stainless Steel Waste Products Generated during Laser Cutting in Nitrogen Atmosphere

Zubko, Maciej; Loskot, Jan; Świec, Paweł; Prusik, Krystian; Janikowski, Zbigniew

doi:10.3390/met10121572

Cited by 9 publications

(6 citation statements)

References 22 publications

(26 reference statements)

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“…The majority of current experimental studies are found observing the morphology of cutting kerf [10][11][12], which limits the ability to reveal the physical mechanism of ejected particles. To get more appropriate results, some studies have tried to either directly track the generation of particles using a CCD camera [13] or collect and characterize the ejected particles in both open [14,15] and enclosed [9] environments. Through the CCD camera, Yilbas et al [13] found that the ejected steel particles are generally spherical with diameters ranging from 50 µm to 300 µm, where the particle size increases with higher laser power or lower assist gas velocity.…”

Section: 𝑺 𝑟𝑒𝑐𝑜𝑖𝑙mentioning

confidence: 99%

Formation Mechanism and Physical Properties of Particle Ejection during Laser Cutting of Metal Alloys

Nie,

Low,

Liu

et al. 2024

Preprint

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Micro-scale particle ejection, an inevitable second emission during laser cutting of metal alloys, leads to significant hazards to operators’ lung and workpiece’s surface quality. This study established a Multiphysics numerical model to investigate the formation mechanism and physical properties of the ejected particles. An incompressible Newtonian laminar non-isothermal multiphase fluid flow was modelled for the laser-metal interaction process by implementing the governing equations, sources terms representing the laser energy and dynamic assist gas pressure, and melting and solidification effect. The volume of fluid (VOF) method, together with dynamic mesh adaption, was employed to track the metal-air interface of the two-phase fluid model. The physical formation phenomena of particles ejected from the kerf front were illustrated by the temperature and morphology evolution history. The dynamic behaviour of the ejected particles was revealed by their shape, size and velocity distribution over time using VOF-to-DPM technique. The effect of laser power and assist gas pressure on the equivalent diameter and velocity of the ejected particles were further studied quantitively to assist the development of subsequent exhaustion systems for secondary emissions. The developed numerical model takes a step forward in understanding the mechanics at the kerf regions and assisting the development of subsequent exhaustion systems for secondary emissions during laser cutting of high-end components.

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Section: 𝑺 𝑟𝑒𝑐𝑜𝑖𝑙mentioning

confidence: 99%

Formation Mechanism and Physical Properties of Particle Ejection during Laser Cutting of Metal Alloys

Nie,

Low,

Liu

et al. 2024

Preprint

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“…The higher the nitrogen pres-sure, the more the cutting parameters and properties can deviate from the optimal ones, yet a burr-free quality cut can still be obtained (Figure 2). Higher nitrogen pres-sure also allows for faster-cutting speed, but cutting with nitrogen at lower pressure is more cost-effective [5]. Compared to nitrogen cutting, it is 3 to 5 times slower.…”

Section: Parameters and Properties Of Cutting With Auxiliary Gasesmentioning

confidence: 99%

“…Before proceeding with laser cutting, it is very important to check the laser beam position and adjust it to the center of the nozzle (Figure 1). Failure to do so may result in poor cuts, uncut workpieces, or in damaged fiber laser parts [4][5][6].…”

Section: Introduction To Cutting Parametersmentioning

confidence: 99%

Optimization of nitrogen use efficiency in cutting of austenitic stainless steel by a fiber laser

Duspara¹,

Matysiak²,

Vidaković³

et al. 2022

FME Transactions

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In metallurgical processes, metal sheet cutting is usually a basic technological operation that needs to be performed. All other technological operations follow the procedure of metal sheet cutting, with the final aim of manufacturing a final product. Machines used for that basic metal cutting operation shall be reliable, efficient, fast, and relatively easy to work with. While working with a laser, the authors noticed the inefficiency of cutting with nitrogen. Nitrogen bottles got empty too quickly, which caused additional costs. Inefficient, i.e., excessive nitrogen consumption requires a more frequent supply of nitrogen. During the COVID-19 pandemic, nitrogen was not always available, as suppliers shifted to manufacture oxygen bottles for medical needs. Therefore, the authors engaged in finding solutions to reduce the consumption of nitrogen at cutting. The mentioned problem was studied within the experiment that focused on the optimization of nitrogen use during fiber laser cutting, the procedure, and results of which are described in this paper. Specimens of different cutting parameters were prepared and cut to measure their roughness and burr height. The collected data were used to create a mathematical model with an ANOVA table. The experiment resulted in the determination of optimal cutting parameters achieved by the lowest possible cutting gas pressure.

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“…The process is more complicated in the case of thermal cutting due to the low melting point. It is recommended to use a high speed and optimum laser power, suitable for the thickness, in order to obtain low surface roughness [35][36][37][38][39]. Taking into account the above literature data, it can be concluded that cutting speed and auxiliary gas pressure are the most significant parameters affecting the change in surface porosity, while the impact of laser power is much less [40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Surface Stereometry of Alloyed Austenitic Steel after Fibre Laser Cutting using Confocal Microscopy

et al. 2022

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The paper extends the concept of cut edge quality and examines the fibre laser cutting process. A Prima Power Platino Fiber Evo device with a reference speed (RS) of 3500 mm/min was used for laser cutting. In order to analyse the influence of the laser cutting speed on the cut edge quality of X5CrNi18-10 stainless steel sheets, macroscopic studies were conducted on a stereoscopic microscope and surface stereometry on a confocal microscope. The obtained results were analysed to evaluate 2D and 3D parameters. These parameters make it possible to determine the cut edge quality and the susceptibility to the application of protective coatings. It was observed that the value of the Sa parameter is the highest for a cutting speed equal to 130% of RS. The Sz parameter is similar, while the Sk, Spk and Svk parameters rise as the speed increases, which is a negative phenomenon. Comparative tests were also conducted for four specimens made at cutting speeds of 70%, 85%, 100% and 115% of RS, respectively. It was found that the laser cutting speed has a significant impact on the cut edge quality and that stainless steel can be cut while maintaining the technological regime at 115% of RS.

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Analysis of Stainless Steel Waste Products Generated during Laser Cutting in Nitrogen Atmosphere

Cited by 9 publications

References 22 publications

Formation Mechanism and Physical Properties of Particle Ejection during Laser Cutting of Metal Alloys

Formation Mechanism and Physical Properties of Particle Ejection during Laser Cutting of Metal Alloys

Optimization of nitrogen use efficiency in cutting of austenitic stainless steel by a fiber laser

Analysis of the Surface Stereometry of Alloyed Austenitic Steel after Fibre Laser Cutting using Confocal Microscopy

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