Abstract：In order to deepen insight on the inclusions behavior in the ultra-low carbon IF steel during the deoxidation and alloying process, laboratory experiments were carried out to simulate the corresponding industrial process using a Si-Mo heated high-temperature furnace, and the inclusions were studied in detail by densely sampling during the experiment. It was found that before adding Al, the inclusions in the molten steel were mainly spherical FeOx. After adding Al, the light-black sphere Al2O3 formed firstly, then transformed into spheroidal or bulk shaped Al2O3, followed by the irregular Al2O3 rapidly, and finally cluster Al2O3 formed by aggregating. The whole transformation of Al2O3 was completed within around 2 min after adding Al. After adding Ti, three types of Al-Ti complex inclusions formed. However, they would transform into stable Al2O3 around 4 min after adding Ti. The total oxygen content and the amount of inclusions showed a decreasing trend during the deoxidation and alloying process, and the cleanliness of molten steel improved gradually.
于会香, 潘明, 杨德新. 超低碳IF钢脱氧合金化过程中夹杂物的行为[J]. 钢铁, 2020, 55(6): 46-53.
YU Hui-xiang, PAN Ming, YANG De-xin. Behavior of inclusions in ultra-low carbon IF steel during deoxidation and alloying process. Iron and Steel, 2020, 55(6): 46-53.
[1] 朱国森, 于会香, 王万军, 等. IF钢冷轧板表面缺陷研究[J]. 钢铁, 2004, 39(4): 54.(ZHU Guo-sen, YU Hui-xiang, WANG Wan-jun, et al. Study of surface defects of cold-rolled IF steel sheet[J]. Iron and Steel, 2004, 39(4): 54.) [2] 王新华. 高品质冷轧薄板钢中非金属夹杂物控制技术[J]. 钢铁, 2013, 48(9): 1.(WANG Xin-hua. Non-metallic inclusion control technology for high quality cold rolled steel sheets[J]. Iron and Steel, 2013, 48(9): 1.) [3] 冀云卿, 王新华, 邓小旋, 等. 冷轧薄板表面缺陷成因研究及控制[J]. 炼钢, 2014, 30(2): 22.(JI Yun-qing, WANG Xin-hua, DENG Xiao-xuan, et al. Study on the causes and controlling of defects for cold-rolled sheet[J]. Steelmaking, 2014, 30(2): 22.) [4] 朱坦华, 周秋月, 任英, 等. 二次氧化过程IF钢中间包中夹杂物演变行为[J]. 钢铁, 2020, 55(3): 35.(ZHU Tan-hua, ZHOU Qiu-yue, REN Ying, et al. Inclusion evolution in IF steel during tundish reoxidation[J]. Iron and Steel, 2020, 55(3): 35.) [5] 罗衍昭,田志红,李向奎,等. 超低碳IF钢中夹杂物来源的示踪分析[J]. 中国冶金, 2019, 29(9): 56. (LUO Yan-zhao,TIAN Zhi-hong,LI Xiang-kui,et al. Analysis of inclusions source in ultra-low carbon IF steel by tracer method[J]. China Metallurgy, 2019, 29(9): 56.) [6] 邹明, 徐荣嬛, 李积鹏, 等. Ti-IF钢非金属夹杂物形核热力学和演变机理[J]. 中国冶金, 2017, 27(7): 12.(ZOU Ming, XU Rong-huan, LI Ji-peng, et al. Nucleation thermodynamic and evolution of non-metallic inclusions in Ti-IF steel[J]. China Metallurgy, 2017, 27(7): 12.) [7] 肖鹏程,赵茂国,朱立光,等. IF钢连铸坯凝固钩数学模拟与试验[J]. 钢铁, 2019, 54(7): 49. (XIAO Peng-cheng,ZHAO Mao-guo,ZHU Li-guang,et al. Mathematical simulation and experiment on solidification hook of IF steel[J]. Iron and Steel, 2019, 54(7): 49. ) [8] 罗衍昭, 季晨曦, 邓小旋, 等. 优化保护渣提高超低碳IF钢表面质量[J]. 钢铁, 2017, 52(4): 38.(LUO Yan-zhao, JI Chen-xi, DENG Xiao-xuan, et al. Optimization of mold flux to improve surface quality of ultra-low carbon IF steel[J]. Iron and Steel, 2017, 52(4): 38.) [9] 刘彭, 隋亚飞, 徐刚军,等. 低碳钢夹杂物产生原因及控制[J]. 钢铁, 2020, 55(2): 67.(LIU Peng, SUI Ya-fei, XU Gang-jun, et al. Inclusion generation and control of low carbon steel[J]. Iron and Steel, 2020, 55(2): 67.) [10] 赵成林, 唐复平, 朱晓雷, 等. IF钢连铸坯表层夹杂分布特征的试验[J]. 钢铁, 2017, 52(12): 42.(ZHAO Cheng-lin, TANG Fu-ping, ZHU Xiao-lei, et al. Experiment on distribution characteristics of surface inclusions in IF steel continuous casting billet[J]. Iron and Steel, 2017, 52(12): 42.) [11] Wakoh M, Sano N. Behavior of alumina inclusions just after deoxidation[J]. ISIJ International, 2007, 47(5): 627. [12] Tanabe J, Suito H. Effect of tellurium on supersaturation in aluminum deoxidized liquid iron[J]. Metallurgical and Materials Transactions B, 1995, 26(1): 95. [13] Wasai K, Mukai K, Miyanaga A. Observation of inclusion in aluminum deoxidized iron[J]. ISIJ International, 2002, 42(5): 459. [14] 王国承, 张立峰. 钢液中夹杂物形核热力学的尺寸效应及临界晶核尺寸计算[J]. 钢铁, 2012, 47(6): 22.(WANG Guo-cheng, ZHANG Li-feng. Thermodynamics dependenton size in nucleation process of inclusion and calculation of critical nucleus radius in clean molten steel[J]. Iron and Steel, 2012, 47(6): 22.) [15] 赵凤林, 李仁超. 氧化铝夹杂的形态[J]. 钢铁, 1990, 25(2): 18.(ZHAO Feng-lin, LI Ren-chao. Morphology of Al2O3 inclusion[J]. Iron and Steel, 1990, 25(2): 18.) [16] Tiekink W, Boom R, Overbosch A, et al. Some aspects of alumina created by deoxidation and reoxidation in steel[J]. Ironmaking and Steelmaking, 2010, 37(7): 488. [17] Van Ende M A, Guo M, Proost J, et al. Formation and morphology of Al2O3 inclusions at the onset of liquid Fe deoxidation by Al addition[J]. ISIJ International, 2011, 51(1): 27. [18] Van Ende M A, Guo M X, Zinngrebe E, et al. Morphology and growth of alumina inclusions in Fe-Al alloys at low oxygen partial pressure[J]. Ironmaking and Steelmaking, 2009, 36(3): 201. [19] Beskow K, Sichen D. Experimental study of the nucleation of alumina inclusions in liquid steel[J]. Scandinavian Journal of Metallurgy, 2003, 32(6): 320. [20] Zhang L, Pluschkell W. Nucleation and growth kinetics of inclusions during liquid steel deoxidation[J]. Ironmaking and steelmaking, 2003, 30(2): 106. [21] YANG W, DUAN H, ZHANG L, et al. Nucleation, growth, and aggregation of alumina inclusions in steel[J]. JOM, 2013, 65(9): 1173. [22] 张立峰, 杨文, 张学伟, 等. 钢中夹杂物的系统分析技术[J]. 钢铁, 2014, 49(2): 1.(ZHANG Li-feng, YANG Wen, ZHANG Xue-wei, et al. Systematic analysis of non-metallic inclusions in steel[J]. Iron and Steel, 2014, 49(2): 1.) [23] WANG M, BAO Y, CUI H, et al. The composition and morphology evolution of oxide inclusions in Ti-bearing ultra low-carbon steel melt refined in the RH process[J]. ISIJ International, 2010, 50(11): 1606. [24] Doo W C, Kim D Y, Kang S C, et al. The morphology of Al-Ti-O complex oxide inclusions formed in an ultra low-carbon steel melt during the RH process[J]. Metals and Materials International, 2007, 13(3): 249. [25] Basu S, Choudhary S K, Girase N U. Nozzle clogging behaviour of Ti-bearing Al-killed ultra low carbon steel[J]. ISIJ International, 2004, 44(10): 1653. [26] Wang C, Nuhfer N T, Sridhar S. Transient behavior of inclusion chemistry, shape, and structure in Fe-Al-Ti-O melts: Effect of titanium/aluminum ratio[J]. Metallurgical and Materials Transactions B, 2009, 40(6): 1022. [27] Wang C, Nuhfer N T, Sridhar S. Transient behavior of inclusion chemistry, shape, and structure in Fe-Al-Ti-O melts: Effect of titanium source and laboratory deoxidation simulation[J]. Metallurgical and Materials Transactions B, 2009, 40(6): 1005. [28] Wang C, Nuhfer N T, Sridhar S. Transient behavior of inclusion chemistry, shape, and structure in Fe-Al-Ti-O melts: Effect of gradual increase in Ti[J]. Metallurgical and Materials Transactions B, 2010, 41(5): 1084. [29] Matsuura H, Wang C, Wen G, et al. The transient stages of inclusion evolution during Al and/or Ti additions to molten iron[J]. ISIJ International, 2007, 47(9): 1265. [30] 苑鹏, 章军, 刘道正, 等. 超低碳钢中Al-Ti夹杂物的形成机理和控制技术[J]. 钢铁, 2018, 53(7): 24.(YUAN Peng, ZHANG Jun, LIU Dao-zheng, et al. Formation mechanism and control technology of Al-Ti inclusions in ultra low carbon steel[J]. Iron and Steel, 2018, 53(7): 24.) [31] Sahai Y, Emi T. Tundish Technology for Clean Steel Production[M]. New Jersey: World Scientific Publishing Company, 2008. [32] Marukawa K. The challenge of braking the limit of the steel refining on the mass production[C]//Japan Society for the Promotion of Science 19th Steelmaking Commission Reaction Process Research,[S.l.]:Sumitomo Metal Industries, Ltd.,1996: 1. [33] 秦颐鸣, 王新华, 黄福祥, 等. IF钢生产过程非金属夹杂物行为研究[J]. 东北大学学报:自然科学版, 2015, 36(11): 1614.(QIN Yi-ming, WANG Xin-hua, HUANG Fu-xiang, et al. Behavior of non-metallic inclusions of IF steel during production process[J]. Journal of Northeastern University: Natural Science, 2015, 36(11): 1614.)
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