Laser hardening achieves higher heating and quenching rates than other surface hardening methods. High heating rate minimizes the risk of degradation of the underlying material. Self-quenching is based on removing the heat from the surface into the part’s core by conduction, instead of the conventional cooling by water spray. Gear wheels, which tend to exhibit numerous cracks upon induction hardening, do not crack during laser hardening. In addition to the above mentioned principles, this paper explains how fine microstructure enhances fatigue resistance of parts operating under dynamic loads. In discussions with a customer, a query about fatigue resistance is typically the one that follows the initial question on hardening depth and hardness. In this paper, a description will be given of fatigue crack propagation and tribological behavior of laser-hardened surfaces, which exhibit less wear than conventionally-treated ones. This process produces hardened gear wheels with long life.
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ICALEO 2012: 31st International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing
September 23–27, 2012
Anaheim, California, USA
ISBN:
978-0-912035-96-3
PROCEEDINGS PAPER
Laser hardening of gear wheels Available to Purchase
Stanislav Nemecek;
Stanislav Nemecek
MATEX PM
, s.r.o., Morseova 5, 301 00 Pilsen, Czech Republic
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Tomas Muzik;
Tomas Muzik
MATEX PM
, s.r.o., Morseova 5, 301 00 Pilsen, Czech Republic
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Michal Misek
Michal Misek
MATEX PM
, s.r.o., Morseova 5, 301 00 Pilsen, Czech Republic
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Published Online:
September 01 2012
Citation
Stanislav Nemecek, Tomas Muzik, Michal Misek; September 23–27, 2012. "Laser hardening of gear wheels." Proceedings of the ICALEO 2012: 31st International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. ICALEO 2012: 31st International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Anaheim, California, USA. (pp. pp. 411-414). ASME. https://doi.org/10.2351/1.5062480
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