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| Removal Behavior of Inclusion During RH Vacuum Treatment of X70 Pipeline Steel |
| YANG Guang-wei1，CHU Ren-sheng1，WANG Xin-hua1，HUANG Fu-xiang1，WANG Wan-jun1，YIN Yu-qun2 |
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2. Nanjing Iron and Steel Co., Ltd., Nanjing 210035, Jiangsu， China |
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Abstract Inclusion morphology, composition, number and size at various times of the RH vacuum treatment were investigated on X70 pipeline steel with ASPEX. Results suggest that: The inclusions are mainly liquid globular CaO-Al2O3 with a small amount of MgO throughout RH vacuum treatment. Inclusion number decreases with time and decreases by 70% after 28min RH vacuum treatment. Inclusion number after RH treatment can be dramatically reduced by reducing inclusions before RH treatment. The total inclusions and inclusions with size 1-5μm is monotonously decreased in number, while inclusions over 5μm firstly increase then decrease after reaching the maximum. It takes more time for bigger inclusions to reach the maximum. The average diameter of inclusions increases from 2.2-2.5μm before RH to 3.0-3.9μm after RH.
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Received: 08 April 2013
Published: 20 January 2014
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| [1] |
Zhu G S, Li H B, Li B H, et al. Formation mechanism and control of inclusions in X80 pipeline coils[C]// The 5th International Congress on the Science and Technology of Steelmaking. Dresden, 2012: 1136.
|
| [1] |
Zhu G S, Li H B, Li B H, et al. Formation mechanism and control of inclusions in X80 pipeline coils[C]// The 5th International Congress on the Science and Technology of Steelmaking. Dresden, 2012: 1136.
|
| [2] |
李强, 王新华, 黄福祥, 等. X80管线钢LF-RH二次精炼过程夹杂物行为及控制[J]. 特殊钢, 2011, 32(4): 26.
|
| [2] |
李强, 王新华, 黄福祥, 等. X80管线钢LF-RH二次精炼过程夹杂物行为及控制[J]. 特殊钢, 2011, 32(4): 26.
|
| [3] |
李强, 王新华, 李海波, 等. 低合金高强钢中非金属夹杂物的改性[J]. 北京科技大学学报, 2012, 34(11): 1262.
|
| [3] |
李强, 王新华, 李海波, 等. 低合金高强钢中非金属夹杂物的改性[J]. 北京科技大学学报, 2012, 34(11): 1262.
|
| [4] |
Shirabe K, Szekely J. A Mathematical Model of Fluid Flow and Inclusion Coalescence in the R-H Vacuum Degassing System[J]. Transactions of the Iron and Steel Institute of Japan, 1983, 23(6): 465.
|
| [4] |
Shirabe K, Szekely J. A Mathematical Model of Fluid Flow and Inclusion Coalescence in the R-H Vacuum Degassing System[J]. Transactions of the Iron and Steel Institute of Japan, 1983, 23(6): 465.
|
| [5] |
Soejima T, Kobayashi J, Matsumoto H, et al. Inclusion behavior during the treatment by Emission Spectroscopy[J]. Tetsu-to-Hagane, 1987, 73(12): S970.
|
| [5] |
Soejima T, Kobayashi J, Matsumoto H, et al. Inclusion behavior during the treatment by Emission Spectroscopy[J]. Tetsu-to-Hagane, 1987, 73(12): S970.
|
| [6] |
Miki Y, Shimada Y, Thomas B G, et al. Model of inclusion removal during RH degassing of steel[J]. Iron and Steelmaker, 1997, 24(8): 31.
|
| [6] |
Miki Y, Shimada Y, Thomas B G, et al. Model of inclusion removal during RH degassing of steel[J]. Iron and Steelmaker, 1997, 24(8): 31.
|
| [7] |
Murai T, Matsuno H, Sakurai Eiji, et al. Separation Mechanism of Inclusion from Molten Steel during RH Treatment[J]. Tetsu-to-Hagane, 1998, 84(1): 13.
|
| [7] |
Murai T, Matsuno H, Sakurai Eiji, et al. Separation Mechanism of Inclusion from Molten Steel during RH Treatment[J]. Tetsu-to-Hagane, 1998, 84(1): 13.
|
| [8] |
Tanaka H, Kobayashi S, Ishizaka A. Development of commercially "pure iron" with extra low inclusions at NKK Keihin Works[C]// 83rd Steelmaking Conference. Pittsburgh, 2000: 91.
|
| [8] |
Tanaka H, Kobayashi S, Ishizaka A. Development of commercially "pure iron" with extra low inclusions at NKK Keihin Works[C]// 83rd Steelmaking Conference. Pittsburgh, 2000: 91.
|
| [9] |
Matsuoka K, Terabarake T, Kameyama K, et al. Improvement of quality of steel for bearing at JFE West Japan Works[C]// The 4th international congress on the science and technology of steelmaking. Gifu, 2008: 457.
|
| [9] |
Matsuoka K, Terabarake T, Kameyama K, et al. Improvement of quality of steel for bearing at JFE West Japan Works[C]// The 4th international congress on the science and technology of steelmaking. Gifu, 2008: 457.
|
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2014, Vol. 49 
