摘要
通过优化连铸过程中的结晶器铜板使用方法,实现完全消除由于结晶器铜板引起板坯表面裂纹,同时结晶器铜板镀层的过钢量从2万t提高到6万t;为有效去除板坯中大颗粒夹杂物,改进中间包流场设计,保留稳流器,取消挡墙和挡坝,使得钢水的运动轨迹和停留时间发生变化,从而显著降低板坯中10μm以上大颗粒夹杂物的数量、并能将夹杂物的最大尺寸控制在20μm以内;通过上述工艺实践,实现大幅提高奥氏体不锈钢板坯质量。
After optimizing the using method of mould copper-plate in casting,the surface cracks of slab caused by copper plate can be completely eliminated and the steel weight through copper plate coating can be increased from 2×10-4 ton to 6×10-4 ton.To remove big-particle inclusions in the slab,the tundish flow field design has been innovated：keep the turbulent inhibitor and without weir and dam.The trajectories and the stop times of steel in tundish have been changed.The results shows that the inclusions quantity that the dimension is greater than 10 μm has obviously decreased and the maximum dimension inclusion is under 20 μm.After above process modified,the slab quality of austenite stainless steel has been improved drastically.
出处
《连铸》
2017年第4期17-20,共4页
Continuous Casting
关键词
奥氏体不锈钢
表面裂纹
夹杂物
austenite stainless steel
surface crack
inclusions
