AISI 304 stainless steel marking by a Q-switched diode pumped Nd:YAG laser

作者：Leone C^*; Genna S; Caprino G; De Iorio I

来源：Journal of Materials Processing Technology, 2010, 210(10): 1297-1303.

DOI：10.1016/j.jmatprotec.2010.03.018

• Laser marking
• Nd VAG laser
• Stainless steel

Laser mar king tests were carried out on AISI 304 steel, using a Q-switched diode pumped Nd YAG laser The aim was to determine the correlation occurring between working parameters (i e pulse frequency, beam scanning speed, and CUI rent intensity) and resulting mark visibility The latter was evaluated as the contrast index measured from digital images of the marks To characterize mark features, its width and roughness were estimated, and analyses employing optical and scanning electron microscopy coupled with energy dispersive X-ray technique were carried out
From the experimental results, both sui face roughness and oxidation increased as a function of frequency, resulting in an improvement in contrast, up to a characteristic value, decreasing afterwards Besides, the maximum visibility value was beneficially affected by lower scanning speeds and lower current intensities An empirical model was built, and from it the best processing conditions for optimum mark visibility.

• 出版日期2010-7-1