特厚板坯连铸机间歇式喷淋技术的开发与应用  

Development of Intermittent Spraying Technology for Ultra-thick Slab

作　　者：甄新刚[1] 蒯多圣 朱志远[2] 王国连[1] 王玉龙[2] 赵晶[2] 

机构地区：[1]首钢京唐钢铁联合有限责任公司,河北唐山063200 [2]秦皇岛首秦金属材料有限公司,河北秦皇岛066326

出　　处：《铸造技术》2017年第8期1962-1964,共3页Foundry Technology

摘　　要：特厚板坯由于厚度大、拉速低和水平段积水等原因,易发生表面横裂纹等缺陷。通过开发间歇式喷淋技术,使连铸二冷水间歇式喷出,可以明显提高特厚板坯的铸坯质量。使用高温延塑性测定的手段确定当特厚板坯表面温度提高至850℃以上时,可以明显降低特厚板坯表面横裂纹的发生率。间歇式喷淋节奏设定为开启30 s,关闭60 s。使用间歇式喷淋以后,特厚板坯表面温度提高了80℃左右,特厚板坯表面温差从优化前的60~80℃降低至优化后的20~30℃,特厚板坯表面清理比例减低至0.9%左右,收到良好的效果。Transverse surface cracking is frequently found on ultra-thick slab surface. A new of intermittent spraying technology of second cooling was developed and applied in ultra-thick slab to remarkably improve the surface quality of ultra-thick slab. The surface temperature of ultra-thick slab can be increased up to 850 ℃ through measurement of hot ductility, which remarkably decreases the incidence of occurrence of transverse surface cracking on ultra-thick slab. The pattern of intermittent spraying was designed as opening 30 s and closing 60 s, the surface temperature was increased by 80 ℃. The temperature difference on transverse ultra-thick slab surface was decreased to 20~30 ℃ from 60~80℃ after application of the intermittent spraying technology. Application achieves good effect.

关 键 词：特厚板坯 间歇式喷淋 表面横裂纹 高温延塑性 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]