薄板坯耐候钢表面纵裂成因分析和控制  

Analysis of the Formative Factors and Control Measures of Surface Longitudinal Crack in Thin Slab Weathering Resistant Steel

作　　者：于海涛 YU Haitao(Steel-making Plant of BX STEEL,Benxi,Liaoning 117021)

机构地区：[1]本钢板材股份有限公司炼钢厂,辽宁本溪117021

出　　处：《本钢技术》2018年第4期20-22,共3页Bengang Technology

摘　　要：本钢薄板坯连铸在生产集装箱耐候钢时集中批量出现表面纵裂纹缺陷。本文研究了结晶器冷却、二冷水制度、钢水成分对保护渣影响等因素,对结晶器内初生坯壳生长采取弱冷,修改二次冷却喷淋方式,优化保护渣性能等控制铸坯表面纵裂纹的技术措施,进而改善了薄板坯耐候钢的表面质量。Surface longitudinal cracks appeared in the production of containers in BX STEEL thin slab caster. Mold cooling, secondary cooling water, fluxes function be affected by steel composition were analyzed. Weak cooling was used in the process of initial shell solidifying in the mold, the secondary cooling spray was modified, fluxes function was optimized and other measures to control surface longitudinal cracks. At last the container surface quality was improved.

关 键 词：耐候钢 冷却制度 保护渣性能 

分 类 号：TG335[金属学及工艺—金属压力加工]