薄板坯连铸连轧生产管理系统的设计及实现

阐述薄板坯连铸连轧生产管理系统(CSPMES)的设计思想,及其在涟钢的实现方法,介绍设计过程关于系统安全、性能优化等关键问题的解决方法。     

铸坯角横裂成因及控制

连铸板坯边部横向裂纹的产生主要是由于板坯在冷却中存在边部过冷现象,导致板坯的脆性温度区域刚好处在扇形段矫直区域内,在应力作用下导致裂纹产生,通过优化二冷段矫直区域喷嘴布局,避免板坯边部过冷,使板坯经过矫直段时处于塑性温度区域,从而大幅减少边部裂纹的发生率。     

宝钢罗泾炼钢厂漏钢预报系统探析

本文主要介绍宝钢罗泾炼钢厂从达涅利公司配套引进的漏钢预报系统的检测原理、判断方法以及该系统在现场的使用情况和影响因素.     

本钢薄板坯连铸生产超深冲钢的试验研究

文章分析了本钢薄板坯连铸的设备和工艺特点,认为薄板坯连铸可以用来生产超深冲钢。而在工艺路线上,通过工业试验对比分析认为采用铁水预处理→复吹转炉→LF精炼→RH精炼→薄板坯连铸是最佳选择。     

Area method analysis and thermodynamic behavior of nonmetallic micro-inclusions in casting slab of GCr15 bearing steel

The distribution and characteristics of nonmetallic micro-inclusions of GCrI5 bearing steel were explored through metallographic area method in virtue of tracer method and electronic microscope.The results show that the micro-inclusions,of which the average value is 0.032%,are mainly the compounds formed via the adsorption/aggregation of multielement deoxidized compounds and secondarily deoxidized products on tundish liquid level.The micro-inclusions of diameters from 0 to 5 μm are 92.5% in total,which basically determines the characteristics of inclusions distribution in casting slab.The inclusions of diameters more than 10 μm only account for less than 1% in total,which have little influence on steel quality.The relationship between equilibrium compositions of the first deoxidation products and molten steel compositions was also calculated based on thermodynamic theory.     

Profibus-DP在冶金连铸生产中的应用

介绍西门子S7-400为主PLC,以PROFIBUS-DP网构成的控制系统在兴澄公司三炼钢连铸项目中的使用,重点阐述公用部分PLC的实际运用.