【作者】 陈永； 曾建华； 张敏； 李桂军； 江南红； 李青春； 何生平； 王谦；

【Author】 Chen Yong1,Zeng Jianhua1,Zhang Min1,Li Guijun2,Jiang Nanhong2,Li Qingchun2,He Shengping3,Wang Qian3 (1.PanGang Group Research Institute Co.,Ltd.,Chengdu 611731,Sichuan,China;2.Vanadium Recovery & Steelmaking Plant,PanGang Group,Panzhihua 617062,Sichuan,China;3.College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China)

【机构】 攀钢集团研究院有限公司； 攀枝花钢铁集团公司炼钢厂； 重庆大学材料科学与工程学院；

【摘要】 38CrMoAl钢由于钢中[Al]含量极高([Al]=0.7%-1.1%),在连铸过程中容易导致水口的堵塞,同时在传统的高SiO2熔渣条件下,钢渣反应将导致钢水成分和熔渣性能发生较大的变化,恶化钢的洁净度。通过对高铝钢精炼、连铸特点的分析,得到了适合高铝钢的精炼渣和中间包保护渣成分控制目标,使钢中[Si]的含量得到准确控制,钢的洁净度达到较高水平;同时采用高碱性高玻璃化连铸保护渣理论保证了熔渣吸收Al2O3夹杂后性能的稳定性,通过采用出钢渣洗工艺实现钢中夹杂物形态的控制,确保了连铸浇注顺行。工业性试验结果表明:高铝钢铸坯平均T[O]<0.0012%,[S]<0.003%,铸坯表面和皮下质量良好,完全满足用户要求,并可实现5炉以上的连浇。更多还原

【Abstract】 Nozzle blockage is easy to take place in continuous casting process when producing 38CrMoAl steel due to high content of aluminum([Al]=0.7%-1.1%).Slag-steel reaction will lead to large transformation for composition of molten steel and performance of slag on the condition of traditional high content of SiO2 in slag. And it will reduce the cleanliness of steel as well.The control target of refining slag and tundish powder has been gotten through the analysis of refining & continuous casting characteristics of high aluminum steel.Based on this, the content of Si in molten steel can be controlled accurately,and the cleanliness of steel has gone to a higher level. Moreover,mold powder with high basicity and vitrification ensures the stability of slag after sorbing Al2O3 inclusions in theory.Continuous casting can be carried out successfully with the control of inclusion morphology through slag washing during tapping.Industrial practice shows that T[O]is below 0.0012%and[S]is below 0.003%in bloom.Moreover,surface and subsurface quality of bloom has satisfied the requirements of consumers. With all these countermeasures,38CrMoAl steel can be continuously cast for more than 5 heats.更多还原