|
|
Tundish metallurgical technology of advanced automotive sheet |
MA Wen-jun1, LI Hai-bo1, LIU Guo-liang1, ZHU Ke-ran2 |
1. Research Institute of Technology, Shougang Group Co., Ltd., Beijing 100043, China; 2. Qian'an Iron and Steel Company,Shougang Co., Ltd., Tangshan 064400,Hebei, China |
|
|
Abstract High-grade automobile sheet has a higher proportion of inclusion defects during the subsequent rolling or stamping process. In order to further improve the metallurgical effect of the tundish, the influence of the perforated dam of the tundish on the removal of inclusions during the normal casting process was studied. In order to ensure the consistency of the cleanliness of molten steel, a dam without holes is used on one side, and a perforated dam is used on the other side of the same tundish. Tundish molten steel samples and slab samples are taken, and analyzed by Aspex inclusion automatic scanning electron microscope. The results show that the dam without holes is beneficial to removal of inclusions in the tundish. There is a short-circuit flow in the molten steel flow field in the tundish of the perforated dam. This leads to a short residence time in the tundish, and inclusions don't have enough time to float up. It floats up and enters the crystallizer and slab with the molten steel. Therefore, the cleanliness of the molten steel cast by the dam without holes tundish is better than that of the perforated dam tundish.
|
Received: 24 June 2021
|
|
|
|
[1] |
杨健,职建军,王睿之,等. 汽车外板表面缺陷控制的炼钢技术研究[C]//第二十届全国炼钢学术会议文集,西安:中国金属学会,2019.
|
[2] |
李峰,叶学卫,姜正连,等. 冷轧带钢表面缺陷识别与控制[J]. 冶金设备,2010,179(1):65.
|
[3] |
韦军尤, 赵文博, 陈利, 等. 热轧带钢边部翘皮缺陷成因分析[J]. 连铸,2020 (6): 48.
|
[4] |
Kimura H. Advances in high-purity steel(IF steel) manufacturing technology[J]. Nippon Steel Technical Report, 1994, 351: 59.
|
[5] |
Miki Y,Takeuchi S. Kawasaki steel's steelmaking technologies for mass production of high cleanliness steel sheet[J]. Kawasaki Steel Technical Report, 2000, 32(1): 60.
|
[6] |
Kittaka S, Kanki T. Nippon steel in-mold electro-magnetic stirrer "M-EMS" for slab caster[J]. Nippon Steel Technical Report, 2002, 86(7): 68.
|
[7] |
Kaushik P, Pielet H, Yin H.Inclusion characterisation-tool for measurement of steel cleanliness and process control[J]. Ironmaking and Steelmaking, 2009,36(8): 561.
|
[8] |
袁纲, 杨枝超, 唐树平, 等. 镀锡板夹杂缺陷分析及控制[J]. 连铸,2020 (6): 62.
|
[9] |
王建军,包燕平,曲英.中间包冶金学[M].北京:冶金工业出版社,2001.
|
[10] |
任子平.IF钢中成分及夹杂物的过程控制研究 [D].沈阳:东北大学,2006.
|
[11] |
苑品,包燕平,崔衡,等. 高品质IF钢连铸中间包降低残钢量的水模型研究[J]. 北京科技大学学报, 2011 33(增刊1): 1.
|
[12] |
杨小容,陈崇峰,倪红卫,等.板坯连铸中间包下渣量及影响因素水模型研究[J].武汉科技大学学报(自然科学版),2004,27(1):4.
|
[13] |
崔衡,岳峰,包燕平,等.IF钢连铸头坯洁净度研究[J].钢铁,2010,45(3): 38.
|
[14] |
Mazudar D, Roderick L G. The physical and mathematical modelling of continuous casting tundish systems[J]. ISIJ International, 1999, 39(6): 524.
|
[15] |
Kumar A, Koria S C, Mazudar D. An assessment of fluid flow modelling and residence time distribution phenomena in steelmaking tundish systems[J]. ISIJ Intenational, 2004, 44(8): 1334.
|
[1] |
WEN Xin1,REN Ying1,ZHANG Lifeng2. Cleanliness of GCr15 bearing steel refined by RH and VD vacuum processes[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2022, 34(7): 613-621. |
[2] |
ZHAO Xianjiu1,2,ZHANG Jieyu2,3,LI Chuanjun2,3. Analysis of formation mechanism about Ca-Mg-Al spineltype inclusions in cold thin rolling sheet[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2022, 34(7): 664-671. |
[3] |
YANG Jian, LI Ting-ting. Research progress on inclusion control of non-oriented silicon steel with REM treatment[J]. Iron and Steel, 2022, 57(7): 1-15. |
[4] |
DU Yi-nuo, GUO Lei, YANG Yang, ZHANG Shuai, YU Han-zhang, GUO Zhan-cheng. Numerical simulation of inclusions floating behavior under supergravity field in liquid steel[J]. Iron and Steel, 2022, 57(7): 54-62. |
[5] |
GUO Shuai, ZHU Hang-yu, ZHOU Jie, DONG Shuai, LIANG Yin. Effects of inclusions on stress field in low-density steel under compressive loading[J]. Iron and Steel, 2022, 57(7): 63-72. |
[6] |
LI Jipeng1,2, WANG Liang1, CHENG Shusen1, LIU Zhao1, CHEN Haoyu1, LIU Yong1. Thermodynamic study on calcium treatment of “liquid phase window” and inclusions modification[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2022, 34(6): 523-533. |
|
|
|
|