3+1型乳化液系统工艺润滑制度优化设定技术

 为了研究配置3+1型乳化液系统的冷连轧机组生产不锈钢产品因轧制变形区欠润滑、过润滑以及冷却不足等导致冷轧带钢上表面和下表面质量差异的问题,以某钢厂新建六机架冷连轧机组为研究对象,从乳化液工艺润滑的角度出发,介绍了该机组3+1型乳化液工艺润滑系统布置,分析了工艺润滑制度参数对轧制稳定性的影响因素。通过揭示乳化液浓度、温度和流量与润滑油膜动力黏度的内在联系,建立了乳化液工艺润滑制度与润滑油膜厚度关系模型;进一步,从摩擦热和变形热出发并结合传热学对流换热机理,建立了乳化液工艺润滑制度与冷却效果关系模型;并以此为基础建立了工艺润滑制度与打滑、热滑伤的关系模型。以最大程度实现带钢上表面轧制稳定性、下表面轧制稳定性、带钢上下表面润滑差异性、乳化液冷却效果的综合控制为目标,研发了3+1型乳化液系统的工艺润滑制度综合优化设定技术,实现了对3+1型乳化液系统的乳化液浓度、温度和流量的定量优化。该技术被推广应用到某钢厂六机架冷连轧机组。应用结果表明,该优化方法充分挖掘了3+1型乳化液系统的整体润滑与冷却能力,保证了六机架冷连轧机组各个机架的轧制稳定性,大大减小了不锈钢产品上下表面质量的差异性,为现场创造了较大的经济效益,具有进一步推广应用的价值。

Optimal setting technology of process lubrication system for 3+1 emulsion system

In order to study the quality difference between the upper surface and the lower surface of the cold-rolled strip due to insufficient lubrication,over-lubrication and insufficient cooling in the rolling deformation zone to produce stainless steel products with a 3+1 emulsion system,a certain steel the newly-built six-stand tandem cold rolling mill is the research object. From the perspective of emulsion process lubrication,the layout of the 3+1 type emulsion process lubrication system of the mill is introduced,and the influence of process lubrication system parameters on rolling stability is analyzed. factor. By revealing the intrinsic relationship between the concentration,temperature and flow rate of the emulsion and the dynamic viscosity of the lubricating oil film,a model of the relationship between the emulsion process lubrication system and the thickness of the lubricating oil film was established;further,starting from the friction heat and deformation heat,combined with the convective heat transfer mechanism of heat transfer,established the relationship model of emulsion process lubrication system and cooling effect; and based on this,established the relationship model of process lubrication system,slip and thermal slip. With the goal of maximizing the comprehensive control of the rolling stability of the upper surface of the strip,the stability of the lower surface of the rolling,the difference in lubrication of the upper and lower surfaces of the strip,and the cooling effect of the emulsion,the process of the 3+1 emulsion system has been developed. The comprehensive optimization setting technology of the lubrication system realizes the quantitative optimization of the emulsion concentration,temperature and flow rate of the 3+1 type emulsion system. This technology has been promoted and applied to a six-stand tandem cold rolling mill in a steel plant. The application results show that the optimization method fully exploits the overall lubrication and cooling capacity of the 3+1 emulsion system and ensures that the six-stand tandem cold rolling mill The rolling stability of each stand greatly reduces the difference in the quality of the upper and lower surfaces of stainless steel products,creates greater economic benefits for the site,and has the value of further popularization and application.