炼钢 ›› 2017, Vol. 33 ›› Issue (6): 42-46.

• 凝固与浇铸 • 上一篇    下一篇

倒角结晶器保护渣在含硼钢的开发与应用

赵春宝1,李晓阳1,陈永艳1,王正英1,郭明源2   

  1. 1.西峡龙成冶金材料有限公司,河南 南阳 474500; 2.西峡龙成特种材料有限公司,河南 南阳 474500
  • 接受日期:1900-01-01 出版日期:2017-12-05

Develop and application of chamfering-mold powder for the boron bearing steel

  • Accepted:1900-01-01 Online:2017-12-05

摘要: 针对国内某钢厂生产含硼钢SS400B时,板坯存在严重角部横裂纹缺陷,为防止热轧钢卷形成翘皮缺陷,把直角结晶器改为倒角结晶器,但是引起结晶器内钢水流场、凝固坯壳受到摩擦力及倒角面温度的改变,角部横裂纹虽然得到控制但是倒角面容易产生纵裂缺陷。通过开发倒角结晶器保护渣,从保护渣结晶性能、润滑性能和配碳模式3个方面的设计开发了适应该类含硼钢种浇铸的倒角结晶器保护渣理化性能指标。工业试验表明,含硼钢SS400B板坯角裂得到有效控制,板坯角部缺陷率由8.2 %降低到0.3 %,能够满足用户的使用要求。

关键词: 倒角结晶器保护渣, 含硼钢, 角裂纹, 开发, 应用

Abstract: Facing the serious problem of corner transverse cracks on steel slab while manufacturing SS400B steel in some domestic steel plants, which leads surface up warping on hot rolling, steel plants use chamfering mould instead of right angle mould to solve this. But the longitudinal cracks on slab appear near the chamfering copper plate working face because the different friction and the temperature change the liquid steel flow field and solidified shell. Based three aspect of crystallization, lubricating and carbon composition, a new casting powder was design for chamfering mould casting boron steel. The test shows the cracks on SS400B steel slab have been effective controlled, the crack ratio dropped from 8.2 % to 0.3 %, which meets the customers’ requirement.

Key words: chamfering-mold powder, boron bearing steel, corner crack, develop, application