簾線鋼中Ti夾雜物研究

劉宏玉; 鄭建強; 李玉華; 林國強; 薛正良; 王洪利

doi:10.13374/j.issn1001-053x.2010.07.020

簾線鋼中Ti夾雜物研究

doi: 10.13374/j.issn1001-053x.2010.07.020

1. 武漢科技大學理學院, 武漢 430081;
2. 冶金工業過程系統科學湖北省重點實驗室, 武漢 430081;
3. 南京鋼鐵聯合有限公司新產品研究開發推廣中心, 南京 210035;
4. 武漢科技大學材料與冶金學院, 武漢 430081

基金項目:

冶金工業過程系統科學湖北省重點實驗室(武漢科技大學)開放基金資助項目(No.C201017)

詳細信息

作者簡介:
劉宏玉(1966-),男,教授,博士,E-mail:ecnuliuhongyu@yahoo.com.cn

中圖分類號: TG111.4
計量
- 文章訪問數: 151
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- 被引次數: 0
出版歷程
- 收稿日期: 2009-10-22

Investigation of Ti inclusions in tire cord steel

1. College of Science, Wuhan University of Science and Technology, Wuhan 430081, China;
2. Hubei Key Laboratory of Systems Science in Metallurgical Process, Wuhan 430081, China;
3. Research and Development Center of New Products, Nanjing Iron and Steel United Co. Ltd. (NISUCL), Nanjing 210035, China;
4. College of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

摘要

摘要: 為完善Ti夾雜去除工藝以控制其生成和尺寸,采用激光剝蝕電感耦合等離子體質譜儀測定了80級簾線鋼冶煉過程鋼水樣中Ti含量,發現平均Ti含量在電爐出鋼→精煉→連鑄工序呈先上升后下降趨勢.TiN生成熱力學、凝固偏析及長大動力學計算表明:在目前南鋼80級簾線鋼煉鋼和連鑄控制條件下,TiN只能在凝固率大于98%的兩相區或固相區生成;凝固冷卻速率越大,TiN析出尺寸越小;TiN析出尺寸為3～7μm,與實際金相樣觀察到的尺寸基本一致.
- 簾線鋼 /
- Ti夾雜物 /
- 熱力學 /
- 動力學
Abstract: 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.
- tire cord steel /
- Ti inclusions /
- thermodynamics /
- kinetics