Effect of Laser Cutting Parameters on the Heat Affected Zone and on the Boundary Layer in Steel Laser Processing

Abstract:

This paper investigates the effect of the laser cutting parameters on the heat-affected zone, and on the boundary layer of stainless steel processing. A new analytical resolution based on the boundary layer theory is used to deduce the interaction effects of the cutting parameters on the above zones. The results revealed that, the laminar nitrogen assist gas has a negligible effect on the HAZ depth but it has a remarkable effect on the molten boundary layer. It is also noticed that the pressure gradient remains very small compared to the interface shearing and the conductive heat losses from the cutting zone towards the substrate is dominant compared to the convective heat losses towards the gas.

• Periodical: Defect and Diffusion Forum (Volume 399)
• Pages: 154-163
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.399.154
• Online since: February 2020
• Authors: Samia Aggoune*, Cherifa Abid, El Hachemi Amara
• Keywords: Boundary Layer, Cooling, Cutting, Ejection, Fusion, Gas, Heat Affected Zone, Laser, Metal

References

[1] A. Dubey, V. Yadava, Laser beam machining, Int.J. Mach. Tool.Manu. 48 (2008) 609–628.

[2] K. Huehnlein, K. Tschirpke, R. Helmann, Optimization of laser cutting processes using design of experiments, Phys Procedia. 5 (2010) 243–252.

DOI: 10.1016/j.phpro.2010.08.050

[3] B. S. Yilbas, S. Khan, K. Raza et al., Laser cutting of 7050 Al alloy reinforced with Al2O3 and B4C composites, Te International Journal of Advanced Manufacturing Technology. vol.50, no.1–4, (2010) 185–193.

DOI: 10.1007/s00170-009-2489-6

[4] Schulz W, Becker D, Franke J, Kemmerling and Herziger G, Heat conduction losses in laser cutting of metals, J. Phys. D:Appl. Phys. 26 (1993) 1357-1363.

DOI: 10.1088/0022-3727/26/9/003

[5] I. Miraoui, E. Elimi, M.Boujelbene, and E.Bayraktar, Analysis of roughness and microstructure for high-power laser cutting of stainless steel, Advanced Science Letters. vol.19, no.2, (2013) 483–486.

DOI: 10.1166/asl.2013.4775

[6] I. Miraoui, E. Bayraktar, and E. Bayraktar, Effects of laser cutting main parameters on microhardness and microstructure changes of stainless steel, Advanced Materials Research. vol. 664, (2013) 811–816.

DOI: 10.4028/www.scientific.net/amr.664.811

[7] I. Miraoui, M. Zaied, and M. Boujelbene, Effect of laser beam diameter on cut edge of steel plates obtained by laser machining, Applied Mechanics and Materials, vol. 467 (2014) 227– 232.

DOI: 10.4028/www.scientific.net/amm.467.227

[8] M. Vicanek, G. Simon, Momentum and heat transfer of an inert gas jet to the melt in laser cutting, J. Phys. D, 20 (1987) 1191–1196.

DOI: 10.1088/0022-3727/20/9/016

[9] C. Wandera, A. Salminen, V. Kujanpää , Inert gas cutting of thick section stainless steel and medium section aluminum using a high power fiber laser, J. Laser Appl. 21 (3) (2009) 154-161.

DOI: 10.2351/1.3184429

[10] Saeed omar Mashikhi, John Powell, A.F.H. Kaplan, K. T. Voisey, Heat affected zones and oxidation marks in fiber laser–oxygen cutting of mild steel, Journal of Laser Applications,.

DOI: 10.2351/1.3614404

[11] Al-Ali, H.H. and Selim, M.S. Momentum and Heat Transfer in the Entrance Region of a parallel plate channel: Developing Laminar Flow with constant wall temperature,, Int. J. Heat Mass Transfer, Vol. 51, No. 4, (1992).

DOI: 10.1007/bf00849271

[12] P. Lee, S. V. Garimella, Thermally Developing Flow and Heat Transfer in Rectangular Microchannels of Different Aspect Ratios, Int. J. Heat. Mass Transfer. 49 (2006) 3060–3067.

DOI: 10.1016/j.ijheatmasstransfer.2006.02.011

[13] L. D. Scintillaa,L. Tricaricoa,∗,A. Wetzigb,A. Mahrlec, E. BeyerPrimary losses in disk and CO2 laser beam inert gas fusion cutting, Journal of Materials Processing Technology. 211 (2011) 2050– (2061).

DOI: 10.1016/j.jmatprotec.2011.07.002

[14] A. Mahrle, E. Beyer, Theoretical estimation of achievable travel rates in inert-gas fusion cutting with fibre and CO2 lasers, Proc. Of the Fifth Int. WLT-Conf. on Lasers in Manufacturing, LIM (2009) 215-220.

DOI: 10.2351/1.5061618

[15] L.D. Scintilla, L. Tricarico, A. Wetzig, A. Mahrle, E. Beyer, Primary losses in disk and CO2 laser beam inert-gas fusion cutting, J. Mater. Process. Tech.211 (2011) 2050-2061.

DOI: 10.1016/j.jmatprotec.2011.07.002

[16] H. Schlichting, Boundary Layer Theory, McGraw-Hill, New York, (1982).

[17] Incropera, F.P. and Dewitt, D.P. Fundamentals of Heat and Mass Transfer,, John Wiley & Sons, New York. (1996).

[18] Milo. J. MADI and Miroslav R. Radovanovi, Analysis of the heat affected zone in co2 laser cutting of stainless steel, Thermal science, , Vol. 16, suppl. 2, (2012) pp. S363-S373.

[19] Imed Miraoui, Mohamed Boujelbene, and Mouna Zaied, High-Power Laser Cutting of Steel Plates: Heat Affected Zone Analysis. Advances in Materials Science and Engineering ID 1242565, (2016) 8 pages.

DOI: 10.1155/2016/1242565