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| Effects of Soft Reduction Parameters on Semi-Macro Segregation in Continuously Cast Slab |
| XU Zhi-gang1,WANG Xin-hua1,ZHOU Li1,HUANG Fu-xiang1,YIN Yu-qun2 |
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China
2. Research Institute of Nanjing Iron and Steel Co., Ltd.,Nanjing 210035, Jiangsu, China |
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Abstract The effects of soft reduction parameters, including soft reduction position (fs), soft reduction ratio(RSR) and soft reduction amounts(ASR), on the semi-macro segregation in continuously cast slabs were investigated in present work. The results reveal that centerline segregation is composed of independent semi-macro segregates, which the areal fraction is proportional to the maximum segregation index of carbon. Thus, the key to improving the centerline segregation is to decreasing the area fraction of semi-macro segregates. Soft reduction is an effective measure to reduce the areal fraction of semi-macro segregates. The results of the industrial experiments show that the areal fraction of semi-macro segregates is reduced remarkably as fs>0.75, RSR=1.2mm/m and ASR=4.5mm, consequently, the centerline segregation is improved.
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Received: 04 June 2013
Published: 28 March 2014
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| [1] |
Habu Y, Itoyama S, Emi T, Sorimachi K, Kojima H. Improving Cast Structure and Centerline Segregation of Continuously Cast Slabs by Adding Steel Strip into Mold. Tetsu-to-Hagane, 1981, 67:1498
|
| [1] |
Habu Y, Itoyama S, Emi T, Sorimachi K, Kojima H. Improving Cast Structure and Centerline Segregation of Continuously Cast Slabs by Adding Steel Strip into Mold. Tetsu-to-Hagane, 1981, 67:1498
|
| [2] |
Murayama J, Ichihashi H, Ohtani H, Ohmori Y. The Effect of Chemical Composition on the Center-line Segregation of Continuous Casting Slabs. Tetsu-to-Hagane, 1986, 72:2070
|
| [2] |
Murayama J, Ichihashi H, Ohtani H, Ohmori Y. The Effect of Chemical Composition on the Center-line Segregation of Continuous Casting Slabs. Tetsu-to-Hagane, 1986, 72:2070
|
| [3] |
Pre?linger H, Mayr M, Kaltenbrunner T, Lettner J. Quantitative Assessment of Segregates in Continuously Cast Slabs by Electron Probe Microanalysis. Steel Research. 2002, 73: 149
|
| [3] |
Pre?linger H, Mayr M, Kaltenbrunner T, Lettner J. Quantitative Assessment of Segregates in Continuously Cast Slabs by Electron Probe Microanalysis. Steel Research. 2002, 73: 149
|
| [4] |
Ogibayashi S, Uchimura M, Isobe K, Maede H, Nishihara Y, Sato S. Improvement of Center Segregation in Continuously Cast Blooms by Soft Reduction in the Final Stage of Solidification. Proceedings of The Sixth International Iron and Steel Congress, 1990, Nagoyan ,ISIJ. 1990, 271
|
| [4] |
Ogibayashi S, Uchimura M, Isobe K, Maede H, Nishihara Y, Sato S. Improvement of Center Segregation in Continuously Cast Blooms by Soft Reduction in the Final Stage of Solidification. Proceedings of The Sixth International Iron and Steel Congress, 1990, Nagoyan ,ISIJ. 1990, 271
|
| [5] |
Thome R, Harste K. Principles of Billet Soft-reduction and Consequences for Continuous Casting. ISIJ International. 2006, 46: 1839
|
| [5] |
Thome R, Harste K. Principles of Billet Soft-reduction and Consequences for Continuous Casting. ISIJ International. 2006, 46: 1839
|
| [6] |
Moon C H, Oh K S, Lee J D, Lee S J, Lee Y. Effect of the Roll Surface Profile on Centerline Segregation in Soft Reduction Process. ISIJ International. 2012, 52: 1266
|
| [6] |
Moon C H, Oh K S, Lee J D, Lee S J, Lee Y. Effect of the Roll Surface Profile on Centerline Segregation in Soft Reduction Process. ISIJ International. 2012, 52: 1266
|
| [7] |
侯自兵, 成国光, 饶添荣. 连铸板坯中心线偏析形成机制与轻压下技术. 钢铁. 2011, 46(11): 45
|
| [7] |
侯自兵, 成国光, 饶添荣. 连铸板坯中心线偏析形成机制与轻压下技术. 钢铁. 2011, 46(11): 45
|
| [8] |
吕佐明, 郑晓明. 连铸板坯中心偏析对钢板组织和性能的影响. 金属世界. 2009, 1:20-24
|
| [8] |
吕佐明, 郑晓明. 连铸板坯中心偏析对钢板组织和性能的影响. 金属世界. 2009, 1:20-24
|
| [9] |
Takaishi S, Komai T, Noro K, Akita Y. On the Formation of Centerline Segregation in Continuous-Cast Slab. Tetsu-to-Hagane, 1974, 60: 915
|
| [9] |
Takaishi S, Komai T, Noro K, Akita Y. On the Formation of Centerline Segregation in Continuous-Cast Slab. Tetsu-to-Hagane, 1974, 60: 915
|
| [10] |
Murao T, Kajitani T, Yamumura H, Anzai K, Oikawa K, Sawada T. Simulation of the Center-Line Segregation Generated by the Formation of Bridging. Tetsu-to-Hagane, 2013, 99: 94
|
| [10] |
Murao T, Kajitani T, Yamumura H, Anzai K, Oikawa K, Sawada T. Simulation of the Center-Line Segregation Generated by the Formation of Bridging. Tetsu-to-Hagane, 2013, 99: 94
|
| [11] |
Kobayashi H, Masaoka T, Suzuki M. Control of Centerline Segregation in Continuously Cast Slabs by A New Soft Reduction Method. Proceeding of The Sixth International Iron and Steel Congress, ISIJ, Nagoya, 1990, 285
|
| [11] |
Kobayashi H, Masaoka T, Suzuki M. Control of Centerline Segregation in Continuously Cast Slabs by A New Soft Reduction Method. Proceeding of The Sixth International Iron and Steel Congress, ISIJ, Nagoya, 1990, 285
|
| [12] |
Mayer F, Wu M, Ludwing A. On the Formation of Centreline Segregation in Continuous Slab Casting of Steel due to Bulging and/or Feeding. Steel Research Int., 2010, 81: 660
|
| [12] |
Mayer F, Wu M, Ludwing A. On the Formation of Centreline Segregation in Continuous Slab Casting of Steel due to Bulging and/or Feeding. Steel Research Int., 2010, 81: 660
|
| [13] |
Jacobi H. Investigation of Centreline Segregation and Centreline Porosity in CC-Slabs. Steel Research, 2003, 74: 667
|
| [13] |
Jacobi H. Investigation of Centreline Segregation and Centreline Porosity in CC-Slabs. Steel Research, 2003, 74: 667
|
| [14] |
Tsuchida Y, Sugawara I, Miyahare S, Ishida K, Ishida T, Ishikawa M, Matsumoto S. Semi-macro Segregation in Continuously Cast Slab. Trans. ISIJ, 1982, 22: B265
|
| [14] |
Tsuchida Y, Sugawara I, Miyahare S, Ishida K, Ishida T, Ishikawa M, Matsumoto S. Semi-macro Segregation in Continuously Cast Slab. Trans. ISIJ, 1982, 22: B265
|
| [15] |
Tsuchida Y, Nakada M, Sugawara I, Miyahara S, Murakami K, Tokushige S. Behavior of Semi-macroscopic Segregation in Continuously Cast Slabs and Technique for Reducing the Segregation. Trans. ISIJ, 1984, 24:899
|
| [15] |
Tsuchida Y, Nakada M, Sugawara I, Miyahara S, Murakami K, Tokushige S. Behavior of Semi-macroscopic Segregation in Continuously Cast Slabs and Technique for Reducing the Segregation. Trans. ISIJ, 1984, 24:899
|
| [16] |
Haida O, Kitaoka H, Habu Y, Kakihara S, Bada H, Shiraishi S. Macro- and Semi-macroscopic Fetrues of the Centerline Segregation in CC Slabs and Their Effect on Product Quality. Trans. ISIJ, 1984, 24: 891
|
| [16] |
Haida O, Kitaoka H, Habu Y, Kakihara S, Bada H, Shiraishi S. Macro- and Semi-macroscopic Fetrues of the Centerline Segregation in CC Slabs and Their Effect on Product Quality. Trans. ISIJ, 1984, 24: 891
|
| [17] |
Yim C H, Park J K, You B D, Yang S M. The Effect of Soft Reuction on Center Segregation in CC Slab. ISIJ International, 1996, 36:S231
|
| [17] |
Yim C H, Park J K, You B D, Yang S M. The Effect of Soft Reuction on Center Segregation in CC Slab. ISIJ International, 1996, 36:S231
|
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2014, Vol. 49 
