Hardness Simulation of over-tempered Area During Laser Hardening Treatment

The main problem of laser hardening process is the over-tempered structure with a hardness decrement zone in the overlapped area between different laser tracks, which may not meet the minimum hardness requirements. The over-tempered structure is located at the middle of two overlapped laser tracks o...

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Bibliographic Details
Published inPhysics procedia Vol. 83; pp. 1357 - 1366
Main Authors Martínez, Silvia, Lesyk, Dmytro, Lamikiz, Aitzol, Ukar, Eneko, Dzhemelinsky, Vitaliy
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2016
Subjects
Hardness
Laser hardening
Over-tempered
Simulation
Laser hardening
Simulation
Hardness
Over-tempered
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Summary:The main problem of laser hardening process is the over-tempered structure with a hardness decrement zone in the overlapped area between different laser tracks, which may not meet the minimum hardness requirements. The over-tempered structure is located at the middle of two overlapped laser tracks or between the beginning and the ending of a closed trajectory. In this paper, the hardness in the overlapped zones is studied by means of numerical simulations and experimental tests during a temperature controlled laser hardening with scanning optics process. Thus, in order to study their difference and to validate the proposed methodology, two steels with very different tempering curves has been used; a cold work tool steel and a medium-carbon low-alloy steel.
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2016.08.143