Al含量對汽車用高強鋼中夾雜物的影響

肖超; 崔衡

doi:10.13374/j.issn2095-9389.2018.s1.004

Al含量對汽車用高強鋼中夾雜物的影響

doi: 10.13374/j.issn2095-9389.2018.s1.004

肖超^1,2,
崔衡^1, ,

1. 北京科技大學鋼鐵共性技術協同創新中心;
2. 北京科技大學工程技術研究院

詳細信息

通訊作者:
崔衡, E-mail:cuiheng@ustb.edu.cn

中圖分類號: TG142.1
計量
- 文章訪問數: 12
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- 被引次數: 0
出版歷程
- 收稿日期: 2018-01-20
- 網絡出版日期: 2023-07-18

Effect of Al content on inclusions in the automobile high strength steel

XIAO Chao^1,2,
CUI Heng^{1
, ,}

1. Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing;
2. Institute of Engineering Technology,University of Science and Technology Beijing

摘要

摘要: 應用氧氮分析、掃描電鏡夾雜物自動分析、熱力學計算等方法, 研究了Al含量不同的三種典型汽車用高強鋼中夾雜物的數量、種類、析出溫度的變化規律.結果表明, 鋼中Al的質量分數從0.054%增加到1.35%, 鋼中的T[O]質量分數從0.00150%減少到0.00075%, 夾雜物數量從38.28 mm^-2減少到28.12 mm^-2, 鋼中夾雜物的數量呈減少趨勢.隨著鋼中Al的質量分數的增加, 鋼中氧化物夾雜的演變規律為Al₂O₃·MnO→MgAl₂O₄, 鋁系夾雜物的演變規律為Al₂O₃→Al N, 硫化物夾雜的演變規律為MnS→MgS.熱力學計算表明, Al N夾雜的生成與鋼中的Al含量有關, Al含量高的鋼中Al N夾雜更易生成;Al N的析出溫度隨著Al含量的增加而上升, 析出溫度分別為1375、1528和1561 K.
- 高強鋼 /
- 鋁含量 /
- 夾雜物 /
- 氮化鋁 /
- 熱力學計算
Abstract: With the addition of Al, the type, amount and precipitation temperature of inclusions in high strength steel for automobile will change.The characteristics of inclusions including amount, species and precipitation temperature in three typical automotive high strength steels with different Al contents were investigated by oxygen and nitrogen analysis, scanning electron microscopy (SEM) , and thermodynamic calculation.The results show that the mass fraction of Al in steel increases from 0.054%to 1.35%, the mass fraction of T[O]in steel decreases from 0.00150%to 0.00075%, and the number of inclusions decreases from 38.28 mm^-2to 28.12mm^-2, the number of inclusions in steel tends to decrease.With the increase of Al mass fraction in the steel, the evolution route of main oxide inclusions is Al₂O₃·MnO→MgAl₂O₄, the main aluminum inclusion changes from Al₂O₃to Al N;and the evolution route of sulfide inclusions is MnS to MgS.The thermodynamic calculations indicate that the formation of Al N inclusions is related to the Al content in the steel, and the Al N inclusions in steel with high Al content are easier to be formed.The precipitation temperature of Al N increases with the increase of Al content, and the precipitation temperatures are 1375, 1528 and 1561 K, respectively.
- high strength steels /
- aluminum content /
- inclusions /
- aluminum nitride /
- thermodynamic calculation

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參考文獻(15)

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