多规格钢坯连铸连轧新工艺流程

New process of continuous casting and rolling of multi-specification billets

钢铁连铸连轧同一生产线上的多钢种、多断面的特钢生产严重影响设备和工艺的稳定性,使得铸坯内部质量难以得到根本性地提高。基于此,提出一种连铸新工艺技术,这种新型特钢连铸工艺技术可满足向不同的轧钢生产线提供多种规格的优质钢坯,产品规格范围宽,能满足优质钢大压缩比的需求,保证最终产品的组织结构和机械性能所需要的最小变形量。采用该新工艺技术所生产的钢坯的低倍质量得到极大地提高,消除了连铸坯固有的"小钢锭结构"带来的"缩孔"和"中心疏松"缺陷,中心碳偏析也得到了改善。

The production of multi-grade and multi-section special steel on the same production line for continuous casting and rolling of iron and steel seriously affects the stability of equipment and technology,making it difficult to fundamentally improve the internal quality of the slab.Based on this,a new continuous casting technology is proposed.This new special steel continuous casting technology can meet the requirements of providing various specifications of high-quality billets to different steel rolling production lines.The product specification range is wide.It can meet the requirements of high compression ratio of high-quality steel and ensure the minimum deformation required by the structure and mechanical properties of the final product.The low-power quality of the billet produced by the new technology is greatly improved,the defects of"shrinkage cavity"and"central porosity"caused by the inherent"small ingot structure"of the billet are eliminated,and the central carbon segregation is also improved.