Optimization of the Laser Hardening Process by Adapting the Intensity Distribution to Generate a Top-hat Temperature Distribution Using Freeform Optics

被引：29
作者：
Klocke, Fritz [1 ]
Schulz, Martin [2 ]
Graefe, Stefan [3 ]
机构：
[1] Rhein Westfal TH Aachen, Lab Machine Tools & Prod Engn WZL, Steinbachstr 19, D-52074 Aachen, Germany
[2] Rhein Westfal TH Aachen, Aachen Ctr Integrat Lightweight Prod AZL, Campus Blvd 30, D-52074 Aachen, Germany
[3] Fraunhofer Inst Prod Technol IPT, Steinbachstr 17, D-52074 Aachen, Germany
来源：
COATINGS | 2017年 / 7卷 / 06期
关键词：
laser hardening; intensity profile; top-hat; freeform optics; 42CrMo4; AISI/SAE; 4240; 1.7225; POWER DIODE-LASERS; FATIGUE BEHAVIOR; HEAT-TREATMENT; TOOL-STEEL; AISI-4140; 42CRMO4; BEAM;
D O I：
10.3390/coatings7060077
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：16
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