Analysis of laser cutting of 1.2 MM thick austenitic stainless steel
Atayo, Asonganyi Al Bashir, Mahmood Rahman, Muhammad M. Nair, Rajeev
Atayo, Asonganyi
Al Bashir, Mahmood
Rahman, Muhammad M.
Nair, Rajeev
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Issue Date
2021-02-16
Type
Conference paper
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Keywords
Laser cutting,Stainless steel,Kerf width,CW Nd,YAG laser
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Citation
Atayo, A. A., Bashir, M., Rahman, M. M., & Nair, R. (2020). Analysis of laser cutting of 1.2 MM thick austenitic stainless steel. Paper presented at the ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), , 2B-2020 doi:10.1115/IMECE2020-24513
Abstract
Stainless steel 304 is one of the most commonly used steel types for corrosion resistance applications, but higher melting point is a limitation in industries from a manufacturing point of view. The non-conventional and subtractive manufacturing technique of laser cutting — a beam directed method, is suitable for these applications. A Gaussian laser beam is directed at the material that melts, burns, vaporizes, or is blown away by a jet of gas, leaving a fine edge with good surface finish. In this study, a numerical study was performed to study the multi-physical fluid processes of laser cutting. Towards this, modeling was performed using 1.2 mm thick austenitic stainless-steel coupons that was cut using a continuous width neodymium-doped yttrium aluminum garnet (CW Nd: YAG) laser. The results showed smoother surface cut, little dross formation, lower temperature rise in heat affected zones, and less finish time at a cutting speed of 8m/min, higher laser power above 1000 W, gas pressure of 11 bars, and focus distance of −1.0 mm. It was observed that an increase in laser power at a faster cutting speed led to an increase in kerf width, reduction in dross formation, lower temperature rises in heat affected zones and a reduced finish time. The simulation results were compared with published experimental data and found to be well within a maximum difference of 15%.
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Publisher
American Society of Mechanical Engineers (ASME)
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ASME International Mechanical Engineering Congress and Exposition;