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Effect of Surface Conditions on Laser Hardening Using a Polarized Laser Beam
Published September 13, 1993 by ISATA - Dusseldorf Trade Fair in United Kingdom
Event: ISATA 1993
Laser transformation hardening of low carbon steel was performed by using a linearly polarized CO2 laser beam. Surface roughness of the specimens was varied by buffing or milling to investigate the influence of surface roughness of absorptivity. The results indicate that surface finish affects the apparent Brewster angle and absorptivity. The shielding condition during laser hardening was varied and it was found that the oxide layer formed during hardening affects absorptivity of the laser beam.