利用ASPEX全自动扫描电镜对X70管线钢RH真空处理过程的夹杂物形貌、成分、数量和尺寸进行了系统研究.结果表明,RH过程中夹杂物主要为液态球状含少量MgO的CaO-Al2O3系夹杂物.夹杂物随RH真空处理时间的增加而减少,RH处理28 min后,钢液中夹杂物去除率达70％.除延长RH真空处理时间外,减少RH进站夹杂物可大幅降低RH终点夹杂物数量.总体夹杂物和1～5μm夹杂物数量随RH真空处理时间单调递减;对于大于5 μm的夹杂物,其数量先增大后减少,而且随着夹杂物尺寸的增加,数量达到最大值所需真空处理时间增加.RH真空处理后,夹杂物平均尺寸有所增加,由2.2～2.5μm增加到3.0～3.9μm.
参考文献
| [1] | ZhuGS;Li H B;LiBH.Formation Mechanism and Control of Inclusions in X80 Pipeline Coils[A].Dresden,2012:1136. |
| [2] | 初仁生,杨光维,黄福祥,王万军,王新华.钙处理工艺对X70管线钢夹杂物的影响[J].钢铁研究学报,2013(05):24-30. |
| [3] | 王新华,李秀刚,李强,黄福祥,李海波,杨建.X80管线钢板中条串状CaO-Al2O3系非金属夹杂物的控制[J].金属学报,2013(05):553-561. |
| [4] | 李强,王新华,黄福祥,王建,王万军.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(04):26-30. |
| [5] | 李强,王新华,李海波,黄福祥,朱国森,姜敏,王万军.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(11):1262-1267. |
| [6] | 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(06):465. |
| [7] | Soejima T;Kobayashi J;Matsumoto H et al.Inclusion Behavior During the Treatment by Emission Spectroscopy[J].Tetsu To Hagane,1987,73(12):S970. |
| [8] | Y.Miki .Model of Inclusion Removal During RH Degassing of Steel[J].Iron & Steelmaker,1997(8):31-38. |
| [9] | Murai T;Matsuno H;Sakurai Eiji et al.Separation Mechanism of Inclusion From Molten Steel During RH Treatment[J].Tetsu To Hagane,1998,84(01):13. |
| [10] | Tanaka H;Kobayashi S;Ishizaka A.Development of Commercially "Pure Iron" With Extra Low Inclusions at NKK Keihin Works[A].Pittsburgh,2000:91. |
| [11] | Matsuoka K;Terabarake T;Kameyama K.Improvement of Quality of Steel for Bearing at JFE West Japan Works[A].Gifu,2008:457. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%