船板钢CCSA板坯连铸二冷系统优化

来源期刊：钢铁钒钛2011年第1期

论文作者：董进明 王慧霞 仇圣桃 干勇

文章页码：79 - 83

关键词：板坯连铸； 船板钢； 角部横裂； 二冷系统优化

Key words：slab continuous casting； ship-plate steel； transverse corner cracks； optimization for secondary cooling system

摘    要：针对船板钢CCSA板坯角部横裂纹发生率偏高的现象,在高温力学性能测试和铸坯表面温度测量的基础上,分析认为二冷系统造成的铸坯温度分布不合理是其主要成因。采取两项措施来优化二冷系统:改变部分喷嘴型号并调整喷嘴布置;利用修正的板坯连铸凝固传热数学模型对二冷配水进行优化。试验结果表明,二冷系统优化后,铸坯角部温度有了较大提升,角部横裂纹发生率由3.7%降至0.41%。

Abstract: For the higher incidence of transverse corner cracks of CCSA slab in a steelmaking plant,it is analyzed that the main reason of transverse corner cracks is unreasonable temperature distribution caused by secondary cooling system,based on the research of high temperature mechanical property of CSSA and the measurement of slab surface temperature.So two measures have been taken to optimize the secondary cooling system: firstly,part of the nozzle types is changed and the nozzle arrangement was adjusted;secondly,secondary cooling water is optimized by the modified solidification heat transfer model of slab continuous casting.The industrial test shows that the temperature at the corner of slab is improved and the rate of transverse corner crack is reduced from 3.7% to 0.41% after optimization.