Analysis of Laser Surface Hardening of GM246 Cast Iron

Abstract:

Laser surface modification technology is one of the most advanced technologies, which uses laser to modify the characteristics of the surface to offer superior performance for various industrial applications. In this study, laser surface hardening behavior of GM246 case iron was investigated. Result shows that excellent laser surface hardening of GM246 cast iron need low power density and scanning speed. With power of 2500 W, scanning speed of 300 mm/min and power density of 2500 W/cm², the laser surface hardening of GM246 cast iron achieved the hardness of 790HV, which was 2-3 times higher than the hardness of base metal. Also, the depth of laser surface hardening case achieved 0.9 mm and the hardening case demonstrated three subzones.

• Periodical: Materials Science Forum (Volume 1035)
• Pages: 596-601
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1035.596
• Online since: June 2021
• Authors: Hui Zhen Wang*, Yue Wen Zhai, Le Yu Zhou, Zubi Zhang, Gang Yang, Chao Min Gong
• Keywords: Cast Iron, Hardness, Laser Surface Hardening, Melting, Microstructure

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