炼钢

• 试验研究 • 上一篇    下一篇

高洁净度轴承钢冶炼关键技术的研究

  

  1. 1.北京科技大学 钢铁冶金新技术国家重点实验室,北京100083;2.北京科技大学 冶金与生态工程学院,北京100083
  • 接受日期:1900-01-01 出版日期:2014-06-05

Key technologies of smelting high cleanliness bearing steel with EAF

  • Accepted:1900-01-01 Online:2014-06-05

摘要: 国内某钢铁企业使用100 t电炉冶炼轴承钢,很难将铸坯全氧质量分数控制在10×10-6以下,通过系统研究提出以下改进措施:终点碳质量分数控制在0.1 %以上;将铝脱氧剂的加入和造渣提前至LF精炼前;精炼渣碱度控制在5~8,w(CaO)/ w(Al2O3)的值控制在1.5~1.7,MgO质量分数控制在5 %~8 %;适当减小电磁搅拌强度,防止保护渣卷入。工艺试验结果表明,通过以上措施可将轴承钢铸坯全氧质量分数控制在10×10-6以下。

关键词: 电炉, 轴承钢, 全氧含量, 关键技术, 工业试验

Abstract: The bearing steel was smelted using 100 t EAF in the domestic steel factory, and it is difficult to control of the total oxygen mass fraction less than 10×10-6. After a system of the research, the improvement measures were proposed as followed: the end-point carbon mass fraction was above 0.1 %; the addition of Al-deoxidizer and the slagging were advanced to the LF refining; the slag basicity was controlled in 5-8, and w(CaO)/w(Al2O3) of the slag was controlled in 1.5-1.7, and w(MgO) was controlled in 5 %-8 %; the electromagnetic stirring intensity was reduced in order to prevent mold slag entrapment. The industrial test showed that the total oxygen mass fraction of the bearing steel could be controlled below 10×10-6 by using the improvement measures.

Key words: EAF, bearing steel, the total oxygen, key technologies, industrial test