激光工艺参数对钛合金表面着色稳定性的影响  

Influence of Laser Process Parameters on Coloring Stability of Titanium Alloy Surface

作　　者：周凯 杨灿 杨焕 郑俊健 欧阳德钦 吴旭 李春波 Zhou Kai;Yang Can;Yang Huan;Zheng Junjian;Ouyang Deqin;Wu Xu;Li Chunbo(Key laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes,Shenzhen Technology University,Shenzhen 518118,Guangdong,China;Sino-German College of Intelligent Manufacturing,Shenzhen Technology University,Shenzhen 518118,Guangdong,China)

机构地区：[1]深圳技术大学先进光学精密制造技术广东普通高校重点实验室,广东深圳518118 [2]深圳技术大学中德智能制造学院,广东深圳518118

出　　处：《中国激光》2023年第8期146-154,共9页Chinese Journal of Lasers

基　　金：广东省普通高校特色创新类项目(2018KTSCX347);深圳市高等院校稳定支持项目(SZWD2021008);深圳技术大学自制实验仪器设备项目(JSZZ202201003);深圳技术大学大学生创新发展项目(XS20220009)。

摘　　要：研究了激光工艺参数的波动对钛合金表面着色稳定性的影响,以及不同激光工艺参数下钛合金表面色块的微观形貌和元素组分。在钛合金表面制备了橙、金、蓝、绿、紫等5种颜色的色块,通过重复实验获得各种成色稳定的色块对应的扫描速度、功率和线间距,实现了在20 J/cm^(2)左右的较低激光能量密度下,在钛合金上获得欧几里得距离ΔE^(*)_(ab)<7的稳定颜色。分析了激光工艺参数在等量或等比变化下的成色稳定性,结果表明,在间隔为1μm的线间距扰动下,ΔE^(*)_(ab)值的波动最大,不利于稳定成色。从样本的微观形貌、结构、元素组分等方面分析了不同色块的微观结构和元素组分差异,结果表明,激光作用后,样本表面分别形成了裂纹状、团块状有明显差异的两种微结构,且氧、碳元素含量区别明显。激光诱导钛合金表面着色是激光作用于材料表面形成的热效应导致的材料升温与表面钛氧化物形成共同作用的结果。Objective The effect of lasers on mechanical properties,control of coloring,and exploration of new coloring processes has been explored in recent years.However,limited research has been conducted on the effect of fluctuations in the process parameters on the stability of titanium alloy surface coloring.In this study,a 355 nm wavelength ultraviolet nanosecond laser is used to investigate the effect of laser process parameter fluctuation on the stability of the titanium surface coloring,to determine the reasons for the formation of different colors from the perspective of thin-film interference,and to explore the effect of different laser process parameters on the surface morphology and elemental composition of the colored samples.Methods The matrix method was adopted to design different laser process parameter ranges,determine the parameter range of stable color formation,and prepare stable colors such as orange,golden,blue,green,purple,and other colors on the sample.The CIE1976 standard chromaticity system of the International Commission on Illumination was used to calibrate the color samples based on the stable colors formed by laser process parameters,and the variation intervals of the scanning speed,laser power,and hatching distance were set according to gradients of equal value or equal ratio,respectively.The color stability of each sample was tested under different process parameter changes using a spectrophotometer.Laser confocal microscopy was used to observe the microscopic topography of samples of different colors,and the coloring stability of each color sample under different process parameters was examined.The samples were analyzed using scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS),and the change characteristics of the samples were further explained based on the microstructure and elemental composition of the samples.Xray diffraction analysis was performed on each colored sample and the titanium alloy substrate to analyze whether the laser action formed a diffraction peak on

关 键 词：激光技术 激光着色 钛合金 工艺参数 纳秒激光 着色机理 

分 类 号：TN249[电子电信—物理电子学]