连铸参数对高碳钢小方坯二次枝晶间距的影响  

Effect of CC Process Parameters on Secondary Dendrite Arm Spacing of High Carbon Steel Billets

作　　者：冯军[1] 陈伟庆[1] 韩静[1] 段贵生[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁》2006年第9期37-39,43,共4页Iron and Steel

摘　　要：通过研究高碳钢小方坯连铸参数对铸坯二次枝晶臂间距的影响发现:采用结晶器电磁搅拌、加大二冷比水量,二次枝晶臂间距减小;过热度升高、拉速增大,二次枝晶臂间距增大。无M-EMS的铸坯接近中心的区域,仍然是枝晶臂发达的柱状晶组织;采用结晶器电磁搅拌,促使铸坯中心区域形成粒状等轴晶组织;随搅拌电流增大,二次枝晶间距明显减小。随二次枝晶臂间距增大,渗透率增加,造成铸坯中心碳偏析加重。The study of secondary dendritic arm spacing（SDAS） in high carbon steel billets shows that the SDAS decreases with application of M-EMS or increase with secondary cooling intensity, and the SDAS increases with increase of superheat and casting speed. The structure of columnar crystals is observed for billets cast without M-EMS, and equiaxed structure for billets cast with M-EMS, in which SDAS decreases obviously with increase of stirring current. The results indicate that the central carbon segregation of billets is aggravated with the increase of permeability due to enlarged SDAS.

关 键 词：高碳钢 小方坯 二次枝晶臂间距 

分 类 号：TF777[冶金工程—钢铁冶金]