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Keywords = AISI/SAE 4240

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16 pages, 6340 KB  
Article
Optimization of the Laser Hardening Process by Adapting the Intensity Distribution to Generate a Top-hat Temperature Distribution Using Freeform Optics
by Fritz Klocke, Martin Schulz and Stefan Gräfe
Coatings 2017, 7(6), 77; https://doi.org/10.3390/coatings7060077 - 7 Jun 2017
Cited by 45 | Viewed by 11777
Abstract
Laser hardening is a surface hardening process which enables high quality results due to the controllability of the energy input. The hardened area is determined by the heat distribution caused by the intensity profile of the laser beam. However, commonly used top-hat laser [...] Read more.
Laser hardening is a surface hardening process which enables high quality results due to the controllability of the energy input. The hardened area is determined by the heat distribution caused by the intensity profile of the laser beam. However, commonly used top-hat laser beams do not provide an ideal temperature profile. Therefore, in this paper the beam profile, and thus the temperature profile, is optimized using freeform optics. The intensity distribution is modified to generate a top-hat temperature profile on the surface. The results of laser hardening with the optimized distribution are thereupon compared with results using a top-hat intensity distribution. Full article
(This article belongs to the Special Issue Laser Surface Treatment)
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