厚板坯氣泡形貌、分布及攜帶夾雜物的原位分析

李向龍; 李寶寬; 劉中秋; 牛冉; 劉強; 任能; 徐國棟; 阮曉明

doi:10.13374/j.issn2095-9389.2018.s1.026

厚板坯氣泡形貌、分布及攜帶夾雜物的原位分析

doi: 10.13374/j.issn2095-9389.2018.s1.026

1. 東北大學冶金學院;
2. 寶山鋼鐵股份有限公司

基金項目:

國家自然科學基金資助項目 (51574068, 51604070)

詳細信息

通訊作者:
李寶寬, E-mail:libk@smm.neu.edu.cn

中圖分類號: TF777
計量
- 文章訪問數: 20
- HTML全文瀏覽量: 7
- PDF下載量: 0
- 被引次數: 0
出版歷程
- 收稿日期: 2018-05-08
- 網絡出版日期: 2023-07-18

In-situ analysis on morphology,distribution and entrapped inclusions of bubbles in thick slab

1. School of Metallurgy,Northeastern University;
2. Baoshan Iron & Steel Co.,Ltd.

摘要

摘要: 對管線鋼X70厚板坯進行分層刨削, 并對厚板坯內氣泡尺寸、形貌及其攜帶夾雜物的情況進行原位分析.結果表明, 厚板坯內約94%的氣泡直徑在200μm以下;厚板坯皮下8 mm范圍內氣泡及其攜帶的夾雜物缺陷較多, 繼續深入刨層, 基本上難以發現明顯的氣泡及其攜帶的夾雜物, 只在個別位置發現了少許氣泡, 且表現出了一定的偶然性;氣泡形態以單個氣泡和孿生氣泡為主, 還有少許葫蘆形氣泡以及“四瓣”形氣泡;發現了四種夾雜物的存在形式:氧化物、團簇狀夾雜物、氣泡群夾雜物以及夾灰.
- 厚板坯 /
- 氣泡 /
- 夾雜物 /
- 原位分析
Abstract: The morphology, distribution, and entrapped inclusions of bubbles in thick slab of X70 pipeline steels were investigated by peeling layer.The results show that the diameters of 94%bubbles in thick slab are less than 200μm;the bubbles and the entrapped inclusions are common in 8 mm depth from the slab surface, but the defects are hardly found as peeling deeper into the middle of slab, only a small number of defects are shown, presenting a random distribution in this area;the main morphology of bubbles existing in slab are single bubbles and twin bubbles, the calabash bubbles and petal bubbles are also found;the inclusions are mainly in four existent forms:oxides, aggregation in clusters, bubbles in clusters, and ash inclusions.
- thick slab /
- bubbles /
- inclusions /
- in-situ analysis

HTML全文

參考文獻(15)

[1]	Tripathy P K, Das S, Jha M K, et al. Migration of slab defects during hot rolling. Ironmaking Steelmaking, 2006, 33 (6) :477
[2]	Lv A Q, Liu C M. Reasons of bubbles emerging in SS400 continuous casting slab and countermeasures. Angang Technol, 2006, 43 (5) :33 (呂愛強, 劉春明. SS400連鑄板坯產生氣泡的原因及解決措施.鞍鋼技術, 2006, 43 (5) :33)
[3]	Wang Q Q, Zhang L F, Seetharaman S, et al. Detection of nonmetallic inclusions in centrifugal continuous casting steel billets.Metall Mater Trans B, 2016, 47 (3) :1594
[4]	Liu Z Q, Li L M, Li B K. Experimental study of bubble size distribution in continuous casting mold. J Northeast Univ Nat Sci, 2017, 38 (1) :57 (劉中秋, 李林敏, 李寶寬.連鑄結晶器內氣泡群粒徑分布的實驗研究.東北大學學報 (自然科學版) , 2017, 38 (1) :57)
[5]	Kumar A, Choudhary S K, Ajmani S K. Distribution of macroinclusions across slab thickness. ISIJ Int, 2012, 52 (12) :2305
[6]	Zhou M, Jiang M, Yuan P, et al. Characterization of large inclusions along the thickness direction in the ultra-low carbon steel slab. Steelmaking, 2016, 32 (2) :60 (周萌, 姜敏, 苑鵬, 等.超低碳鋼連鑄坯厚度方向大尺寸夾雜物分布特征.煉鋼, 2016, 32 (2) :60)
[7]	Deng X X, Wang X H, Li L P, et al. Effect of ladle change process on the surface cleanliness of IF steel continuous casting slabs. J Univ Sci Technol Beijing, 2014, 36 (7) :880 (鄧小旋, 王新華, 李林平, 等.交換鋼包過程對IF鋼連鑄板坯表層清潔度的影響.北京科技大學學報, 2014, 36 (7) :880)
[8]	Shin H J, Thomas B G, Lee G G, et al. Analysis of hook formation mechanism in ultra low carbon steel using CON1D heat flow—Solidification model. Mater Sci Technol, 2004, 2 (1) :11
[9]	Wang M, Bao Y P, Yang Q, et al. Cleanliness evolution of interstitial free (IF) steel slabs in the thickness direction. Chin J Eng, 2015, 36 (3) :307 (王敏, 包燕平, 楊荃, 等. IF鋼鑄坯厚度方向潔凈度演變.工程科學學報, 2015, 36 (3) :307)
[10]	Liu B G, Wen G H, Tang P, et al. Distribution of small bubbles at IF continuous casting slab subsurface. J Univ Sci Technol Beijing, 2013, 34 (12) :1595 (劉丙崗, 文光華, 唐萍, 等. IF鋼鑄坯皮下小氣泡分布.北京科技大學學報, 2013, 34 (12) :1595)
[11]	Yasunaka H, Yamanaka R, Inoue T, et al. Pinhole and inclusion defects formed at the subsurface in ultra low carbon steel.Tetsu-to-Hagane, 1995, 81 (5) :529
[12]	Ren Y, Zhang L F, Yang W, et al. Formation andthermodynamics of Mg-Al--Ti-O complex inclusions in Mg-Al-Ti-deoxidized steel. Metall Mater Trans B, 2014, 45 (6) :2057
[13]	Meng Q Y, Ma Q. Improvement measures for slag defects in continuous casting bloom. Continuous Cast, 2017, 42 (3) :25 (孟慶玉, 馬強.連鑄大方坯夾渣缺陷的改進措施連鑄.連鑄, 2017, 42 (3) :25)
[14]	Liu Z Q, Li L M, Qi F S, et al. Populationbalance modeling of polydispersed bubbly flow in continuous-casting using multiplesize-group approach. Metall Mater Trans B, 2015, 46 (1) :406
[15]	Liu Z Q, Li B K. Large-eddy simulation of transient horizontal gas-liquid flow in continuous casting using dynamic subgrid-scale mode. Metall Mater Trans B, 2017, 48 (3) :1833