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A Study on Laser Surface Treatment Characteristics of High Carbon Steel(HP4MA) for Injection Mold  

Hwang, Hyun-Tae ((재)울산테크노파크)
Choi, Hung-Won ((재)울산테크노파크)
Kim, Jong-Do (한국해양대학교 기관공학부)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.20, no.5, 2011 , pp. 646-652 More about this Journal
Abstract
Recently, lots of automobile part manufacturers try to increase glass fiber content of their plastic parts to improve strength and impact-resistance. For this reason, injection mold requires high hardness and wear-resistant. Laser surface treatment is used to improve characteristics of wear and to enhance the fatigue resistance for injection mold. In this paper, high carbon steel (HP4MA) for injection mold material was heat-treated to harden surface by using high power diode laser (HPDL). To find the process parameters for laser surface treatment of HP4MA, many experiments are carried out as changing the parameters of surface temperature and travel speed of laser. From the results of the experiments, it has been shown that the maximum average hardness is approximately 711~739 Hv when the temperature and the travel of laser are $1,050^{\circ}C$ and 2 mm/sec.
Keywords
Laser surface treatment; High carbon steel[HP4MA]; High power diode laser; Injection mold;
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Times Cited By KSCI : 4  (Citation Analysis)
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