钢板表面微观形貌轧制转印及其光学与粘附效应研究

发布时间：2018-01-31 00:26

本文关键词： 表面微观形貌轧制转印光学效应光泽度粘附效应　出处：《北京科技大学》2017年博士论文　论文类型：学位论文

【摘要】：钢板表面微观形貌决定了钢板表面的光反射效应、涂覆层粘附能力和冲压成形过程储油性。因此,汽车及家电面板、镀锡板及其他涂镀覆层钢板等高档冷轧钢板产品都对表面微观形貌提出特别要求,并且成为决定该类产品的质量和使用性能的关键指标。本文运用理论分析、数值仿真和实验研究等方法对带钢表面微观形貌的精确描述与重构、轧制转印行为以及光反射规律与粘附效应等钢板微观表面质量控制领域的若干前沿问题展开深入研究。(1)针对工业生产中四种主要轧辊表面加工方式制备的轧辊表面微观形貌及其轧制转印生成的带钢表面微观形貌,进行大批量取样测量及分析,提出采取傅里叶级数方法描述、分析轧辊和带钢表面微观形貌的二维轮廓形状,建立一种新的基于傅里叶级数方法的乳辊和带钢表面微观形貌的二维与三维重构方法和模型。(2)针对带钢平整轧制过程塑性变形无网格伽辽金法求解效率较低的问题,建立一种快速无网格求解方法。以某镀锡板高速连续退火线双机架平整机为对象,将带钢塑性变形快速无网格法求解模型,与基于傅里叶级数表面微观形貌重构方法建立的细观尺度真实粗糙表面接触变形压入及挤压模型相结合,建立了带钢表面形貌的轧制转印生成模型,仿真研究了平整过程带钢表面形貌轧制转印规律,并开展轧制转印实验研究验证了仿真模型。(3)针对印铁镀锡钢板的与表面光反射效应相关的美观性要求,将用户的美观性需求指标化并定量化为产品表面光泽度控制目标值,根据光泽度测量原理建立金属表面光泽度理论计算模型,研究钢板表面材质与微观形貌对于光线反射和表面光泽度的影响机理与规律,获得表面微观形貌的粗糙度和峰密度对表面光泽度的影响规律及其数学模型,建立了以美观性质量为最终目标的钢板光泽度控制方法和技术,将之应用于工业生产,解决了产品存在的问题并完全满足了用户的美观性要求。(4)针对钢板表面涂覆防护层的粘附效应要求,提出初始液态涂层在表面的微观尺度复杂流动决定表面粘附力,建立基于多相格子玻尔兹曼方法的粘附力分析模型,仿真研究液滴在不同方式制备的表面微观形貌上和不同粗糙度值的电火花毛化加工表面上的流动行为,获得表面毛化方式和粗糙度对于表面粘附力的影响规律,发现电火花毛化表面的粘附力最大且随着粗糙度值增大而增大,并开展粘附实验研究验证了仿真结果的正确性。
[Abstract]:The surface morphology of steel plate determines the light reflection effect, coating adhesion and oil storage in stamping process. Therefore, automobile and home appliance panel. High-grade cold-rolled steel plate products such as tinplate and other coated steel plate have put forward special requirements for the surface micro-morphology and become the key index to determine the quality and performance of this kind of products. The theoretical analysis is used in this paper. Numerical simulation and experimental study are used to accurately describe and reconstruct the microstructure of strip surface. The rolling transfer behavior, the law of light reflection and the adhesion effect of steel plate surface quality control are studied in depth. Aiming at the micro morphology of roll surface prepared by four kinds of main roll surface processing methods in industrial production and the microcosmic morphology of strip surface produced by rolling transfer printing. The method of Fourier series is used to describe the microtopography of roll and strip surface, and the shape of two-dimensional profile of roll and strip surface is analyzed. A new 2D and 3D reconstruction method and model of micro morphology of milk roll and strip surface based on Fourier series method are established. In order to solve the problem of low efficiency in plastic deformation meshless Galerkin method in strip rolling process. A fast meshless solution method is established. The model of strip plastic deformation is solved by the rapid meshless method taking a tin plating plate high speed continuous de-fire line double stand leveling machine as an object. Combined with the mesoscale real rough surface contact deformation indentation and extrusion model based on the Fourier series surface morphology reconstruction method, the rolling transfer printing model of strip surface morphology was established. The rolling transfer law of strip surface morphology in leveling process is studied by simulation, and the simulation model. 3) the aesthetic requirements related to the surface light reflection effect of tinplate are verified by the rolling transfer experiment. According to the principle of gloss measurement, the theoretical calculation model of metal surface glossiness is established by quantifying the user's aesthetic demand as the target value of product surface gloss control. The influence mechanism and law of surface material and microtopography on light reflection and surface gloss were studied, and the influence of surface roughness and peak density on surface gloss and its mathematical model were obtained. The control method and technology of steel plate gloss with aesthetic quality as the ultimate goal was established and applied to industrial production. Solve the problems of the product and fully meet the aesthetic requirements of the user. 4) for the steel plate surface coating protective layer adhesion effect requirements. The microcosmic complex flow of the initial liquid coating on the surface determines the adhesion force of the surface, and a model of the adhesion force analysis based on the multiphase lattice Boltzmann method is established. The flow behavior of droplets on different surface morphology and EDM surface with different roughness values was studied by simulation, and the effect of surface texturing mode and roughness on surface adhesion was obtained. It is found that the adhesion force of the surface of EDM is the largest and increases with the increase of roughness, and the correctness of the simulation results is verified by the experimental study.
【学位授予单位】：北京科技大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TG335.5

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