控制冷却下强冷及返温阶段板坯表面热塑性及组织形貌变化规律

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (0 KB) HTML (0 KB)
Export: BibTeX | EndNote (RIS)

Abstract The samples of diameter 10 mm were made to simulate slab surface. The variation of hot ductility and microstructure morphology of slab surface during the period of intensive cooling and reheating treatment under surface structure controlled cooling was studied with the Gleeble-2000D hot simulation tester. The theoretical basis will be provided to apply on vertical bending caster of surface structure control cooling. The results show that: the hot ductility of the samples is deteriorated because of the form of widmanstatten structure and film-like proeutectoid ferrite along grain boundary during the period of intensive cooling. However, the treatment of reheating can effectively eliminate the deterioration of hot ductility producing during the period of intensive cooling, which makes the reduced area of the samples increasing to over 40%. Therefore, the treatment of intensive cooling should be accomplished before the slab enters the segment of bending. The slab can enter the bending segments during the period of reheating when the controlled cooling is applied on vertical bending caster.

Received: 26 September 2012 Published: 18 July 2013

PACS:

TF777.1

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	DIAO Xin-Yu

Cite this article:

DIAO Xin-Yu. Variation of Hot Ductility and Microstructure Morphology of Slab Surface During Period of Intensive Cooling and Reheating Under Controlled Cooling[J]. Iron and Steel, 2013, 48(7): 32-35.

URL:

http://www.chinamet.cn/Jweb_gt/EN/ OR http://www.chinamet.cn/Jweb_gt/EN/Y2013/V48/I7/32

[1]	蔡开科.连铸坯表面裂纹的控制[J].鞍钢科技,2004,3:1-
[2]	Harada S,Tanaka S,Misumi H,et al.A formation mechanism of transverse cracks on CC slab surface[J].ISIJ Int,1990,30(4):310-
[2]	Harada S,Tanaka S,Misumi H,et al.A formation mechanism of transverse cracks on CC slab surface[J].ISIJ Int,1990,30(4):310-
[3]	Zarandi F,Yue S.Mechanism for loss of hot ductility due to deformation during solidification in continuous casting of steel[J].ISIJ Int,2004,44(10):1705-
[4]	Kato T,Baba N,Ito Y,et al.利用铸坯表层组织控制预防横向裂纹发生[C][J].中国钢铁年会论文集,2005,10:-
[3]	Zarandi F,Yue S.Mechanism for loss of hot ductility due to deformation during solidification in continuous casting of steel[J].ISIJ Int,2004,44(10):1705-
[4]	Kato T,Baba N,Ito Y,et al.利用铸坯表层组织控制预防横向裂纹发生[C][J].中国钢铁年会论文集,2005,10:-
[5]	Kato T,Ito Y,Kawamoto M,et al.Prevention of slab surface transverse cracking by microstructure control[J].ISIJ International,2003,43(11):1742-
[5]	Kato T,Ito Y,Kawamoto M,et al.Prevention of slab surface transverse cracking by microstructure control[J].ISIJ International,2003,43(11):1742-
[6]	Baba N,Ohta K,Ito Y,et al.Prevention of slab surface transverse cracking at Kashima No 2 caster with surface structure control (SSC) cooling[J].La Revue de Metallurgie,2006,4:174-
[6]	Baba N,Ohta K,Ito Y,et al.Prevention of slab surface transverse cracking at Kashima No 2 caster with surface structure control (SSC) cooling[J].La Revue de Metallurgie,2006,4:174-
[7]	Ito Y,Kato T,Yamanaka A,et al.Improvement of hot ductility in continuously cast strand by ferrite precipitation control[J].Tetsu-to-hagane,2003,10:1023-
[8]	马范军，文光华，唐萍．.冷却速度对含铌、钛外i合金钢铸坯表层组织结构的影响[J][J].北京科技大学学报,2009,31(9):1116-
[7]	Ito Y,Kato T,Yamanaka A,et al.Improvement of hot ductility in continuously cast strand by ferrite precipitation control[J].Tetsu-to-hagane,2003,10:1023-
[8]	马范军，文光华，唐萍．.冷却速度对含铌、钛外i合金钢铸坯表层组织结构的影响[J][J].北京科技大学学报,2009,31(9):1116-
[9]	Lee U H,Park T E,Son K S et al.Assessment of hot ductility with various thermal histories as an alternative method of in situ solidification[J].ISIJ Int,2010,50(4):540-
[10]	宋维锡.金属学[M] [J].冶金工业出版社，北京,2000,:330-
[9]	Lee U H,Park T E,Son K S et al.Assessment of hot ductility with various thermal histories as an alternative method of in situ solidification[J].ISIJ Int,2010,50(4):540-
[10]	宋维锡.金属学[M] [J].冶金工业出版社，北京,2000,:330-