Research on Laser Cleaning of Graphite Lubrication Coating on the Magnesium Alloy Surface
Zhenhai Xu, Yunhui Yue, Donghe Zhang, Shaoxi Xue, Erju Liu, Debin Shan, Jie Xu, Bin Guo
TL;DR
This study explores using laser technology to clean graphite coatings from magnesium alloys efficiently and safely.
Contribution
The research identifies optimal laser parameters for effective and non-damaging cleaning of graphite lubrication coatings on magnesium alloys.
Findings
Optimal laser cleaning parameters were found to be F = 3.82 J/cm2, f = 10 kHz, and v = 3000 mm/s.
The graphite coating was almost completely removed with minimal surface damage and reduced carbon content to 6.42%.
Thermal ablation was identified as the dominant cleaning mechanism.
Abstract
The lubricating coating must be removed from the forged or stamped workpieces. Developing environment-friendly and high-precision cleaning technology is necessary. In this study, a nanosecond pulsed laser was used to clean the graphite lubricating coating of 15 μm thickness on the surface of an MB15 magnesium alloy. The effects of various laser cleaning parameters on the cleaning quality and the cleaning mechanism were studied. When the laser fluence (F) increases from 1.27 to 7.64 J/cm2, the clearance rate increases, and the surface roughness initially decreases before increasing. When the pulse frequency (f) increases from 10 to 30 kHz, the single-pulse energy decreases, the clearance rate decreases, and the surface roughness increases. When the scanning speed (v) increases from 1000 to 5000 mm/s, the spot overlap rate decreases, the clearance rate decreases, and the surface roughness…
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Taxonomy
TopicsLaser-induced spectroscopy and plasma · Laser Material Processing Techniques · Additive Manufacturing Materials and Processes