研究了EAF→LF→VD→软搅→CC工艺生产GCr15轴承钢冶炼过程钢中T[O]及非金属夹杂物的变化情况。通过将电炉出钢碳质量分数控制为0.2%～0.4%、出钢加铝强脱氧及造预精炼渣、LF精炼过程造高碱度强还原性炉渣、VD真空强搅拌及防止中间包二次氧化，可以生产w(T[O])等于8×10－6的轴承钢。在炉外精炼过程中夹杂物经历了Al2O3→MgO·Al2O3→CaO-MgO-Al2O3演变。LF精炼过程夹杂物平均尺寸减小，经过VD真空处理后尺寸增加，接着在软搅和中间包过程继续减小。利用VD真空处理可以去除高达74%的夹杂物。
T[O] and inclusions during EAF→LF→VD→Purging→CC process were investigated on GCr15 bearing steel. Through controlling carbon content at EAF tapping from 0.2%to 0.4%, adding aluminum and flux during tapping for de-oxidation and pre-refining, making high basicity slag with little (TFe+MnO) content during LF refing, stirring the steel in VD and preventing steel reoxidation in tundish, bearing steel with w(T[O])=8 × 10-6 can be produced. Inclusions changed in order of Al2O3→MgO·Al2O3→CaO-MgO-Al2O3 during the secondary refining process. The average size of in-clusions decreased after ladle refining, while picked up after vacuum treatment, and continously decreased during purging and in tundish. Inclusion number can be reduced by 74%through VD process.
参考文献
| [1] | Uesugi T .Recent Development of Bearing Steel in Japan[J].Transactions of the Iron and Steel Institute of Japan,1988,28(11):893. |
| [2] | Kawakami K;Taniguchi T;Nakashima K .Generation Mecha-nisms of Non-Metallic Inclusions in High-Cleanliness Steel[J].Tetsu to Hagane-Journal of the Iron and Steel Institute of Japan,2007,93(12):743. |
| [3] | 庞洪亮,边延君.90t LF（VD）精炼工艺对GCr15轴承钢氧含量的影响[J].特殊钢,2006(01):57-58. |
| [4] | 阮小江,姜周华,龚伟,李阳,李京社.精炼渣对轴承钢中氧含量和夹杂物的影响[J].特殊钢,2008(05):1-3. |
| [5] | 董大西;杨锋功;刘勇.60 t LD-LF-VD-CC工艺生产低氧GCr15轴承钢[A].北京:冶金工业出版社,2009:59. |
| [6] | 于平,陈伟庆,冯军,郁昕.高碱度渣精炼的轴承钢中夹杂物研究[J].钢铁,2004(07):20-23. |
| [7] | 艾新港,包燕平,吴华杰,岳峰,崔衡.RH工艺生产轴承钢脱氧和去除夹杂物研究[J].钢铁,2009(07):43-46. |
| [8] | 耿克,吴明,翁韶华,黄煌.高纯净GCr15轴承钢脆性夹杂物的控制[J].特殊钢,2008(05):54-55. |
| [9] | 刘旭兰,吴晓东,周丹,孙菲,王丹.轴承钢精炼过程非金属夹杂物行为的研究[J].钢铁研究,2009(02):27-30. |
| [10] | 刘绍康,黄煌.减少轴承钢和齿轮钢中大颗粒点状氧化物夹杂（Ds）的工艺实践[J].特殊钢,2008(05):41-42. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%