斯太尔摩线冷却监控系统的开发与应用

斯太尔摩线是基于钢在冷却时组织的转变规律而设计出的一种控制冷却工艺,是控制线材组织性能的关键工序,在线材生产中有着广泛的应用.宝钢高线主要生产钢帘线、钢绞线等高附加值产品,用户反映产品强度波动较大.通过对工艺流程进行一一排查,发现强度波动的主要原因是由于斯太尔摩线冷却工艺无法适应化学成分波动,尤其是环境温度波动造成的.为了解决这一质量难题,根据C曲线原理,通过整体设计、增加硬件、编制软件、建立模型、实现通信和设备安装等一系列研究工作,成功开发出斯太尔摩线冷却监控系统,实现了线材轧后冷却的动态闭环控制.现场应用结果表明系统有效改善了化学成分和环境温度波动对强度的不良影响,显著提高了线材强度的稳定性,取得了预期的效果.

Exploitation and Application of Monitoring System for Stelmor Cooling

The Stelmor cooling line,an advanced controlled-cooling process,which was designed on the basis of the structure transformation law when steel is cooled,has been widely used in the field of wire rod production and played an important role in determining the final performance of a product.The high-speed wire rods produced by Baosteel are materials for high value-added products like steel cord wire,steel strand,etc.However,it was found that the strength of wire rods after the Stelmor cooling fluctuated remarkably at times,and the fluctuation was mainly caused by the products' unstable chemical composition and unstable environmental temperature,which the Stelmor cooling process could not be adapted to.In order to solve this quality problem,a Stelmor cooling monitoring system was successfully developed and a dynamic closed loop control for cooling rolled wire rods was implemented,on the basis of the principle of the curve C and through a series of research work such as the system function design,hardware configuration,software design,cooling model establishment,equipment installation and data communication.With this system,effect of the fluctuations in chemical composition and environmental temperature on strength of the wire rod was lessened and the wire rod's stability of strength was improved.The expected function of this system was obtained.