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http://dx.doi.org/10.7736/KSPE.2012.29.4.395

Characteristics on Surface Hardening by using of Continuous Wave Nd:YAG Laser of Cold-Work Die Steel(STD11) about Variation of Focal Lens F-number  

Hwang, Chan-Youn (Department of Advanced parts and Materials Engineering, Chosun Univ.)
Yang, Yun-Seok (Department of Advanced parts and Materials Engineering, Chosun Univ.)
Lee, Ka-Ram (Department of Mechatronics Engineering, Chosun Univ.)
Yoo, Young-Tae (Department of Mechatronics Engineering, Chosun Univ.)
Publication Information
Journal of the Korean Society for Precision Engineering / v.29, no.4, 2012 , pp. 395-408 More about this Journal
Abstract
An experimental investigation with 2.8kW Nd:YAG laser system was carried out to study the effects of different laser process parameters on the microstructure and hardness of STD11. The optical lens with the elliptical profile are designed to obtain a wide surface hardening area with uniform hardness. The Laser beam is allowed to scan on the surface of the work piece varying the power (1600, 1800 and 1900kW) and traverse speed (200, 400, 600, 800 and 1000mm/min) at three different F-numbers of lens. After laser surface treatment three zones, In the microstructure have been observed : melted zone(decarburization), heat affected zone(martensite), and the substrate.
Keywords
Cold-Work Die Steel; Heat Treatment Optical System; CW Nd:YAG Laser;
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Times Cited By KSCI : 1  (Citation Analysis)
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