Effect of Laser Process Parameters on the Surface Absorbtivity

Abstract:

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Hardening laser surface offers new possibilities for the enhancement of the mechanical resistance of superficial layers. Essential for the laser treatment processes is the efficiency at which the incident laser power is coupled into the work piece. The aim of the work was to study the effect of some factors such as spot shape, beam angle of incidence and surface coating on the steel surface absorptivity. Samples made of carbon steel were laser processed using a CW CO2 - 1,2 kW laser unit. Different process parameters (beam power, spot dimension and traverse speed), were used. The microstructure of laser hardened layers which have been investigated by optical microscopy. The mechanical characterization of the layers has been done by hardness measurements. Correlation has been established between the structure of the laser-processed layers and the process parameters.

Info:

Periodical:

Materials Science Forum (Volumes 480-481)

Edited by:

A. Méndez-Vilas

Pages:

207-212

Citation:

G. Demian et al., "Effect of Laser Process Parameters on the Surface Absorbtivity", Materials Science Forum, Vols. 480-481, pp. 207-212, 2005

Online since:

March 2005

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$38.00

[1] F Dausinger, I. Shen, Energy coupling efficiency in laser surface treatment, ISIj-International, vol. 33, No9 (1993), pp.925-933.

DOI: https://doi.org/10.2355/isijinternational.33.925

[2] F. Dausinger, M. Beck, T. Rudlaff and T. Wahl, On Coupling Mechanisms in Laser Process, Proc. LIM 5, ed. H. Hugel, PUBL. IFS Ltd. (1988), pp.177-186.

[3] Steen. W. Met Technology. - New York, December (1979) p.456.

[4] Shang H.J. - Mater Processing Technol. 23, (1990) p.119.

[5] Sagaro et al. Rev. Metal. Madrid 34 (2), (1998) pp.140-143.

[6] W. M. Steen and C. Courtney, "Laser Surface Treatment of En8 Steel using a 2kW CO2 Laser, Metal tech. 6 (12), (1979) p.456.

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