镀锡钢板表面光泽度轧制转印控制

三类高档冷轧钢板产品——印铁镀锡钢板、涂装汽车面板、装饰装潢钢板对视觉美观性的要求,关乎钢板表面微观形貌的光物理效应,具体表现为色彩特性、反光特性、粗细特性、映像特性、均匀特性和轮廓清晰度等。针对其中印铁镀锡钢板表面视觉美观性要求,将用户需求指标化并定量化镀锡钢板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,并经批量工业生产试验实测数据验证光泽度理论模型的正确性后,研究揭示钢板表面微观形貌对表面光泽度的影响机制,获得钢板表面微观形貌参数R_a值和P_c值对表面光泽度的影响规律。应用光泽度计算模型将用户要求的光泽度控制目标进一步转化为镀锡钢板生产中可控的R_a值和P_c值的控制目标,并针对某条国内最先进DI材镀锡钢板连续生产线,研究提出镀锡钢板表面光泽度控制的工艺方法和技术,投入长期生产稳定使用后使产品的光泽度质量完全满足了用户的严格要求,创造了显著的经济和社会效益。

Control of Surface Glossiness during Temper Rolling Aimed at Improving Visual Aesthetics of Tinplate

The required appearance quality of tinplate, coating plates and decoration steel plates that is determined by light physical effects of steel strip micro-topography. The required appearance quality includes color, reflection characteristics, texture, clearness of imaging, uniformity and edge sharpness. Glossiness is used as a criterion to assess the appearance quality of tinplates that are related to the microstructure of the steel plate surface such as brightness uniformity, graphic distortion and edge blur when printing on the packing tinplates. The relation between glossiness, which is an optical property of a surface, and the parameters that characterize the geometrical properties of the surface is derived from the basic principle of glossiness measuring, thus the impact of the variations of Ra and Pc on glossiness is illuminated. The mathematical correlation between glossiness and the geometrical parameters of tinplate is established by the stepwise regression on the field measured data during batch industrial production, thus how the variation of glossiness with Ra and Pc is concluded. The correlation is verified by the statistic model of production test. Thus, the control of glossiness is replaced by the control of Ra and Pc which is more feasible in tinplate producing. This study proposed a solution and control techniques for the manufacturing process of glossiness qualified tinplate. It is adopted by a factory and the qualified rate of its product reached 97.62%. The solution basically meted clients’ needs.