帘线钢中Ti夹杂物研究  

Investigation of Ti inclusions in tire cord steel

作　　者：刘宏玉[1,2] 郑建强 李玉华 林国强 薛正良[4] 王洪利[1,2] 

机构地区：[1]武汉科技大学理学院,武汉430081 [2]冶金工业过程系统科学湖北省重点实验室,武汉430081 [3]南京钢铁联合有限公司新产品研究开发推广中心,南京210035 [4]武汉科技大学材料与冶金学院,武汉430081

出　　处：《北京科技大学学报》2010年第7期866-871,共6页Journal of University of Science and Technology Beijing

基　　金：冶金工业过程系统科学湖北省重点实验室(武汉科技大学)开放基金资助项目(No.C201017)

摘　　要：为完善Ti夹杂去除工艺以控制其生成和尺寸,采用激光剥蚀电感耦合等离子体质谱仪测定了80级帘线钢冶炼过程钢水样中Ti含量,发现平均Ti含量在电炉出钢→精炼→连铸工序呈先上升后下降趋势.TiN生成热力学、凝固偏析及长大动力学计算表明:在目前南钢80级帘线钢炼钢和连铸控制条件下,TiN只能在凝固率大于98%的两相区或固相区生成;凝固冷却速率越大,TiN析出尺寸越小;TiN析出尺寸为3～7μm,与实际金相样观察到的尺寸基本一致.In order to improve Ti inclusions removal technology for controlling their formation and size,Ti contents in melting steel specimens of 80-grade tire cord steel,obtained from the melting process,were measured by laser ablation inductively coupled plasma mass spectrometry. It was found that the average Ti content firstly increased and then decreased during the process of EAF tapping → refining → continuous casting. Under current control conditions of 80-grade tire cord steel in Nanjing Iron and Steel United Co. Ltd. （NISUCL）,the calculation results of formation thermodynamics,solidification segregation and growth kinetics of TiN particles show that TiN formation takes place only in the two-phase region where the solidification ratio is greater than 98% or the solid region. The greater the cooling rate during solidification,the smaller the size of precipitated TiN particles. The size of precipitated TiN particles is 3 to 7 μm,in agreement with that measured in the metallographic image of TiN inclusions found in wire rod specimens.

关 键 词：帘线钢 Ti夹杂物 热力学 动力学 

分 类 号：TG111.4[金属学及工艺—物理冶金]