基于均匀随机分布偏移相位的轧辊激光毛化技术  

Roll Laser Texturing Technology Based on Uniformly Randomly Distributed Offset Phase

作　　者：马仁豪 禹玄毅 李健垚 沈重阳 邓晓旭 Ma Renhao;Yu Xuanyi;Li Jianyao;Shen Chongyang;Deng Xiaoxu(School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学物理与天文学院,上海200240

出　　处：《光学学报》2024年第5期230-236,共7页Acta Optica Sinica

基　　金：国家自然科学基金(61927822)。

摘　　要：提出一种基于随机分布偏移相位的轧辊表面峰值密度(PPI)和粗糙度范围可控的无序激光毛化技术。利用多光束干涉原理,分析轧制带钢表面反射光之间形成明暗相间条纹的机制。基于光线追迹方法,研究凸台微结构在等间距分布基础上的偏移产生的随机分布相位,对轧制带钢表面单一波长反射光形成的干涉条纹的影响,以使带钢表面多种波长反射光干涉条纹叠加形成的莫尔条纹近乎消失。轧辊表面凹坑微结构中心间距随机偏移与衰减性“拷贝”获得的轧制带钢表面凸台相同,采用理论与模拟分析得到的均匀分布中心间距随机偏移,利用激光雕刻方法对轧辊材料样件进行无序激光冲击毛化,毛化样件表面粗糙度为3.79μm,PPI为179。所提出的基于均匀分布偏移相位的无序激光可控轧辊毛化技术,实现了PPI和粗糙度范围可控的轧辊毛化,并且可灵活控制轧制带钢表面质量。Objective Cold rolled strips are widely employed in automobiles,home appliances and other industries,and their surface micromorphology affects the surface chromatic aberration of the strip steel.The strip steel surface with regularly distributed microstructure tends to exhibit alternative bright and dark fringes.When the microstructure is randomly distributed,the stripes caused by multi-beam interference will be weakened.The surface microstructure of the rolled strip corresponds to that of the roll surface.The disordered roll laser texturing technology features less pollution,a wide range of texturing roughness,and high surface hardness,which can reduce the surface chromatic aberration of the rolled strip and is expected to meet the growing demand for sound stamping performance and fine brightness after the painting of cold rolled sheet productions.Methods The laser texturing roller technology is presented for controlling the range of peak per inch(PPI)density and roughness of rolling rolls based on the offset phase difference of the random distribution.The formation mechanism of light and dark alternately stripes on the surface of rolled strip steel is analyzed using the multi-beam interference principle.By the ray tracing method,the random distribution phase difference generated by the offset of equally spaced convex microstructures is studied to weaken the interference fringes formed by single-wavelength reflected light on the surface of rolled strip steel,which thus eliminates Moiréfringes generated by multiple wavelengths.The reflected coherent irradiance is adopted to study the corresponding uniform distribution function characteristic parameters under different center spacing when the interference fringes are broken.Meanwhile,laser impact pit experiments are conducted on roll material samples to obtain the corresponding relationship between the textured pit morphology and laser impact conditions.The random deviation of the pit microstructure on the roll surface is the same as that of the convex microstruc

关 键 词：表面光学 多光束干涉 激光毛化 冷轧轧辊 均匀随机分布 偏移相位 

分 类 号：TN249[电子电信—物理电子学]