Influence of Laser Process Parameters on Color Obtained by Marking

Zhongmin, 刘忠民 Liu; Qingmao, 张庆茂 Zhang; Liang, 郭亮 Guo; Qitao, 吕启涛 Lü; Kun, 杨琨 Yang

doi:10.3788/cjl201441.0403011

Cited by 3 publications

(3 citation statements)

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“…When the hatch space is smaller than the focused beam diameter on titanium alloy substrate, there will be scanning overlap between successive scan lines perpendicular to the laser scanning direction, which will disappear until the hatch space is greater than the focused beam diameter. The influence of laser processing parameters on the laser-induced colors are based on heat treatment [12], so the titanium alloy substrate will absorb more thermal energy with the increase of the overlaps. Thus the surface of color area becomes rough with the decrease of scanning velocity or hatch space, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The ultrashort pulse laser is very expensive and is not conducive to the promotion of laser coloring technology. So many researches have been conducted to better understand the short pulse laser color marking process, which mainly focused on the influence of laser parameters on the resulting colors [1,2,[6][7][8][9][10][11][12], analysis of oxide film [3,4] and color marking mechanism [5,13]. But the surface roughness of laser marked area has much to do with laser parameters and resulting colors.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Nanosecond Laser Processing Parameters on the Titanium Alloy Surfaces Colorization

Lü

2017

KEM

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Laser color marking experiments on titanium alloy substrates were carried out to investigate the impact of selected laser processing parameters on the resulting colors. The CIE L*a*b* color space was used to quantify these colors. The surface roughness of the marked color areas was measured by using a TR200 hand-held surface roughness instrument. The relationships between laser parameters and CIE L*a*b* values and surface roughness of the colors were obtained. Results clearly showed that different colors ranging from blue and gray to yellow were produced. Some colors can be obtained by different sets of parameters, while some colors can only be produced by a specific combination of process parameters due to the existence of different forms of heat input and thermal process. The b* value increased to the maximum which represented yellow then decreased. The surface roughness of color areas decreased with the increase of focal plane offset, scanning velocity, or hatch space.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Nanosecond Laser Processing Parameters on the Titanium Alloy Surfaces Colorization

Lü

2017

KEM

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“…Wu et al studied the influence of picosecond laser such as scanning gap, scanning speed and pulse energy on colouring effects [5] . However, the picosecond laser [6,7] raised a high cost for customer, it is of great meaning to investigate the application of nano laser on metal colourization [8,9] . The biggest challenge for nanosecond laser is that the large clusters and chunks produced by nano pulse processing [10][11][12] , which means the application of laser-induced colourization with nanosecond laser is still need exploration.…”

Section: Introductionmentioning

confidence: 99%

Laser-Induced Colourization on Metal Surface for Product Design

Ji,

Zeng,

Tang

et al. 2024

Frontiers in Artificial Intelligence and Applications

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Colour generation by laser-induced colourization has several advantages compared to dye technology, such as higher resolution, minimal pixel areal and fastness colours. However, current colourization methods need to be pre-designed and the mechanism of laser-induced colourization are still need understanding. Here we investigate the effects of laser parameters on metal surface colourization. Different processing parameters induced transient local heat generation on metal surface that leads to different heat accumulation and oxide compound, which caused different interference with white light and then generating different colour appearance. The colour transition process also obeys the paint theory. This work provides a better way for product designer, engineer and surface researchers.

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