D0:10.13374h.issn1001-053x.2013.06.016 第35卷第6期 北京科技大学学报 Vol.35 No.6 2013年6月 Journal of University of Science and Technology Beijing Jun.2013 钛合金化过程对钢液洁净度的影响 王敏1)☒，包燕平2,3)，杨荃1) 1)北京科技大学国家板带生产先进装备工程技术研究中心，北京1000832)北京科技大学冶金与生态工程学院，北京100083 3)北京科技大学钢铁治金新技术国家重点实验室，北京100083 ☒通信作者，E-mail:worldmind@163.com 摘要重点考察了T合金化过程中影响T收得率的主要因素，并对比分析了Ti合金化前后夹杂物的物相变化及夹 杂物的去除效果.控制氧活度a4o1<350×10-6,A1、Ti合金加入时间间隔大于3min,可以保证Ti收得率>85%：当 aol>350×10-6时，需控制Al、Ti合金加入时间间隔为5min以上.相同a4o和A.情况下，延长Al、Ti加入时 间间隔可以有效提高Ti收得率.RH处理过程中，钢包内当量直径>200um的Al2O3夹杂物在5in内基本可以上浮 去除，但相同尺寸的A-Ti-O复合夹杂的去除时间要比A12O3长1~2min.Ti合金加入后，A12O3夹杂物周围会形成 A-T-O的复合夹杂，这些夹杂物的形成降低Ti的收得率. 关键词炼钢：精炼：合金化：夹杂物：氮化钛 分类号TF769 Effect of ferro-titanium alloying process on steel cleanness WANG Min)☒，BA0Yan-pimg2,3),YANG Quan) 1)National Engineering Research Center of Flat Rolling Equipment,University of Science and Technology Beijing,Beijing 100083, China 2)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China 3)State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:worldmind@163.com ABSTRACT The main factors were studied which influence the titanium yield during a ferro-titanium alloying process.The inclusion phases and removal effect were comparatively analyzed before and after ferro-titanium alloying. When controlling the activity of oxygen (ao)before deoxidation below 350x10-6,the interval time between Al and Ti addition above 3 min can guarantee the titanium yield above 85%.With ao above 350x10-6,the interval time between Al and Ti addition should be extended more than 5 min.Extending the interval time between Al and Ti addition can improve the titanium yield at the same ao and [Al].During RH refining,Al2Os inclusions with the equivalent diameter above 200 um can float and be removed within 5 min,but the removal time of Al-Ti-O inclusions with the same size is 1 to 2 min more than pure Al2O3.Al-Ti-O complex inclusions form around Al2Os after the titanium alloy being added into the melt,and the titanium yield decreases due to the formation of these inclusions. KEY WORDS steelmaking;refining;alloying:inclusions;titanium nitride F钢（无间隙原子钢）由于其优良的深冲性能完全固定钢液中C和N原子，理论T含量需满 和良好的表面质量被广泛应用于汽车面板和复杂深足公式(1)例，实际T的控制还要在此基础上考虑 冲件山.Ti-F(钛稳定化无间隙原子钢)主要依靠Ti0.02%0.04%的过剩T俐.Ti是重要的合金元素， 元素来固定钢液中游离的C和N原子，使其转变有效提高合金化过程中T1收得率对T-F钢冶炼 成TN和Ti(C,N),从而改善钢材的冲压性能☒.非常重要. 收稿日期：2012-03-05 基金项目：中国博士后科学基金资助项目(2012M510319):中央高校基本科研业务费专项(FRF-TP-12-167A)第 35 卷 第 6 期 北 京 科 技 大 学 学 报 Vol. 35 No. 6 2013 年 6 月 Journal of University of Science and Technology Beijing Jun. 2013 钛合金化过程对钢液洁净度的影响 王 敏1) ，包燕平2,3)，杨 荃1) 1) 北京科技大学国家板带生产先进装备工程技术研究中心，北京 100083 2) 北京科技大学冶金与生态工程学院，北京 100083 3) 北京科技大学钢铁冶金新技术国家重点实验室，北京 100083 通信作者，E-mail: worldmind@163.com 摘 要 重点考察了 Ti 合金化过程中影响 Ti 收得率的主要因素，并对比分析了 Ti 合金化前后夹杂物的物相变化及夹 杂物的去除效果. 控制氧活度 a[O] < 350×10−6，Al、Ti 合金加入时间间隔大于 3 min，可以保证 Ti 收得率 >85%；当 a[O] > 350×10−6 时，需控制 Al、Ti 合金加入时间间隔为 5 min 以上. 相同 a[O] 和 [Al]s 情况下，延长 Al、Ti 加入时 间间隔可以有效提高 Ti 收得率. RH 处理过程中，钢包内当量直径 >200 µm 的 Al2O3 夹杂物在 5 min 内基本可以上浮 去除，但相同尺寸的 A-Ti-O 复合夹杂的去除时间要比 Al2O3 长 1∼2 min. Ti 合金加入后，Al2O3 夹杂物周围会形成 Al-Ti-O 的复合夹杂，这些夹杂物的形成降低 Ti 的收得率. 关键词 炼钢；精炼；合金化；夹杂物；氮化钛 分类号 TF769 Effect of ferro-titanium alloying process on steel cleanness WANG Min 1) , BAO Yan-ping 2,3), YANG Quan 1) 1) National Engineering Research Center of Flat Rolling Equipment, University of Science and Technology Beijing, Beijing 100083, China 2) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 3) State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China Corresponding author, E-mail: worldmind@163.com ABSTRACT The main factors were studied which influence the titanium yield during a ferro-titanium alloying process. The inclusion phases and removal effect were comparatively analyzed before and after ferro-titanium alloying. When controlling the activity of oxygen (a[O]) before deoxidation below 350×10−6 , the interval time between Al and Ti addition above 3 min can guarantee the titanium yield above 85%. With a[O] above 350×10−6 , the interval time between Al and Ti addition should be extended more than 5 min. Extending the interval time between Al and Ti addition can improve the titanium yield at the same a[O] and [Al]s. During RH refining, Al2O3 inclusions with the equivalent diameter above 200 µm can float and be removed within 5 min, but the removal time of Al-Ti-O inclusions with the same size is 1 to 2 min more than pure Al2O3. Al-Ti-O complex inclusions form around Al2O3 after the titanium alloy being added into the melt, and the titanium yield decreases due to the formation of these inclusions. KEY WORDS steelmaking; refining; alloying; inclusions; titanium nitride IF 钢 (无间隙原子钢) 由于其优良的深冲性能 和良好的表面质量被广泛应用于汽车面板和复杂深 冲件 [1]. Ti-IF(钛稳定化无间隙原子钢) 主要依靠 Ti 元素来固定钢液中游离的 C 和 N 原子，使其转变 成 TiN 和 Ti(C, N)，从而改善钢材的冲压性能 [2] . 完全固定钢液中 C 和 N 原子，理论 Ti 含量需满 足公式 (1)[3]，实际 Ti 的控制还要在此基础上考虑 0.02%∼0.04%的过剩 Ti[4]. Ti 是重要的合金元素， 有效提高合金化过程中 Ti 收得率对 Ti-IF 钢冶炼 非常重要. 收稿日期：2012–03–05 基金项目：中国博士后科学基金资助项目 (2012M510319)；中央高校基本科研业务费专项 (FRF-TP-12-167A) DOI:10.13374/j.issn1001-053x.2013.06.016