Preliminary Study of Ultrasound-Assisted Laser Hardening of AISI H13 Tool Steel

This paper presents the viability of ultrasound in assisting the performance of laser hardening process. A nanosecond pulse laser was employed as a heat source in this study to heat and introduce hardened phase in AISI H13 tool steel. The influences of laser power and traverse speed on surface rough...

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Bibliographic Details
Published in:Key engineering materials 2019-05, Vol.801, p.245-250
Main Authors: Charee, Wisan, Tangwarodomnukun, Viboon
Format: Article
Language:English
Subjects:
Case depth
Case hardenability
Laser beam hardening
Laser processing
Lasers
Metal surfaces
Nanosecond pulses
Polishes
Surface hardening
Surface roughness
Tool steels
Ultrasonic imaging
Viability
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Summary:This paper presents the viability of ultrasound in assisting the performance of laser hardening process. A nanosecond pulse laser was employed as a heat source in this study to heat and introduce hardened phase in AISI H13 tool steel. The influences of laser power and traverse speed on surface roughness and case depth of laser-irradiated region were experimentally investigated. The laser processing with the assist of ultrasound can improve the surface roughness of laser-hardened area by 7.5% and also increase the case depth by 7.65% compared to the non-ultrasound condition. Under a suitable processing condition, the laser can harden and polish the metal surface at the same when the ultrasound was incorporated in the process. The implication of this study will broaden the viability of ultrasound in the laser surface hardening/polishing of metals.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.801.245