中厚板边直裂缺陷控制装备研究  

Research on control equipment of straight edge crack defect of medium plate

作　　者：成旭东 赵文博[2] 张慧[2] CHENG Xudong;ZHAO Wenbo;ZHANG Hui(No.3 Steelmaking Plant,Handan Steel Branch,Hegang Co.,Ltd.,Handan 056015,China;Iron and Steel Research Institute,National Engineering Research Center of Continuous Casting Technology,Beijing 100081,China)

机构地区：[1]河钢股份有限公司邯钢分公司三炼钢厂,河北邯郸056015 [2]钢铁研究总院连铸技术国家工程研究中心,北京100081

出　　处：《炼钢》2020年第3期73-80,共8页Steelmaking

基　　金：国家科技支撑计划项目(2017YFB0304004)。

摘　　要：边直裂缺陷控制装备在使用过程中会使铸机在拉坯方向产生额外的拉坯阻力,造成电机电流增大,影响铸机正常生产,严重的甚至会产生"滞坯"风险。因此,建立了边直裂缺陷控制装备模型,对该装备的运行过程进行了数值模拟,研究了压制不同宽度二次倒角与所产生的额外拉坯阻力和所需压制力的对应关系,并以此为依据开展工业试验,研究了拉坯阻力增大对电机电流实际变化的影响。同时计算了不同压力条件下的拉坯力,对比分析了电机电流的变化。研究表明:所产生的额外拉坯阻力的大小与压制的二次倒角宽度呈正比,在满足工艺效果的前提下,压制最大二次倒角宽度时的电机实际电流小于额定电流,说明其产生的额外拉坯阻力不会对该钢厂铸机正常运行产生影响。Using straight edge crack defect control equipment can cause additional resistance in the direction of billet drawing,which makes motor current grow bigger. It can influence the normal production of caster,serious or even cause the risk of "slab stagnation". Therefore,the control equipment model of edge crack defect was established,and the operation process of the equipment was simulated. The relationship between the different width second chamfer and the additional drawing resistance and the required pressing force was studied. On the basis of this,industrial tests were carried out to study the effect of the increase of drawing resistance on the actual change of electric current. At the same time,the drawing force under different reduction forces was calculated,and the change of motor current was compared and analyzed. Researches showed that the second chamfer width was proportional to the additional resistance of the billet. On the premise of satisfying the technological effect,the motor current when pressing the maximum width of the second chamfer was less than the rated motor current. It showed that the additional resistance would not affect the normal operation of the steel caster.

关 键 词：边直裂缺陷 控制装备 二次倒角 额外拉坯阻力 电机电流 

分 类 号：TF777[冶金工程—钢铁冶金]