本文關鍵詞： 表面微觀形貌 軋制轉印 光學效應 光澤度 粘附效應　出處：《北京科技大學》2017年博士論文　論文類型：學位論文

【摘要】：鋼板表面微觀形貌決定了鋼板表面的光反射效應、涂覆層粘附能力和沖壓成形過程儲油性。因此,汽車及家電面板、鍍錫板及其他涂鍍覆層鋼板等高檔冷軋鋼板產品都對表面微觀形貌提出特別要求,并且成為決定該類產品的質量和使用性能的關鍵指標。本文運用理論分析、數(shù)值仿真和實驗研究等方法對帶鋼表面微觀形貌的精確描述與重構、軋制轉印行為以及光反射規(guī)律與粘附效應等鋼板微觀表面質量控制領域的若干前沿問題展開深入研究。(1)針對工業(yè)生產中四種主要軋輥表面加工方式制備的軋輥表面微觀形貌及其軋制轉印生成的帶鋼表面微觀形貌,進行大批量取樣測量及分析,提出采取傅里葉級數(shù)方法描述、分析軋輥和帶鋼表面微觀形貌的二維輪廓形狀,建立一種新的基于傅里葉級數(shù)方法的乳輥和帶鋼表面微觀形貌的二維與三維重構方法和模型。(2)針對帶鋼平整軋制過程塑性變形無網格伽遼金法求解效率較低的問題,建立一種快速無網格求解方法。以某鍍錫板高速連續(xù)退火線雙機架平整機為對象,將帶鋼塑性變形快速無網格法求解模型,與基于傅里葉級數(shù)表面微觀形貌重構方法建立的細觀尺度真實粗糙表面接觸變形壓入及擠壓模型相結合,建立了帶鋼表面形貌的軋制轉印生成模型,仿真研究了平整過程帶鋼表面形貌軋制轉印規(guī)律,并開展軋制轉印實驗研究驗證了仿真模型。(3)針對印鐵鍍錫鋼板的與表面光反射效應相關的美觀性要求,將用戶的美觀性需求指標化并定量化為產品表面光澤度控制目標值,根據光澤度測量原理建立金屬表面光澤度理論計算模型,研究鋼板表面材質與微觀形貌對于光線反射和表面光澤度的影響機理與規(guī)律,獲得表面微觀形貌的粗糙度和峰密度對表面光澤度的影響規(guī)律及其數(shù)學模型,建立了以美觀性質量為最終目標的鋼板光澤度控制方法和技術,將之應用于工業(yè)生產,解決了產品存在的問題并完全滿足了用戶的美觀性要求。(4)針對鋼板表面涂覆防護層的粘附效應要求,提出初始液態(tài)涂層在表面的微觀尺度復雜流動決定表面粘附力,建立基于多相格子玻爾茲曼方法的粘附力分析模型,仿真研究液滴在不同方式制備的表面微觀形貌上和不同粗糙度值的電火花毛化加工表面上的流動行為,獲得表面毛化方式和粗糙度對于表面粘附力的影響規(guī)律,發(fā)現(xiàn)電火花毛化表面的粘附力最大且隨著粗糙度值增大而增大,并開展粘附實驗研究驗證了仿真結果的正確性。
[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.
【學位授予單位】：北京科技大學
【學位級別】：博士
【學位授予年份】：2017
【分類號】：TG335.5

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