炼钢

• 试验研究 • 上一篇    下一篇

电渣重熔高氮钢的洁净度研究

  

  1. (1.北京科技大学 冶金与生态工程学院,北京 100083;2.高端金属材料特种熔炼与制备北京市重点实验室,北京 100083)
  • 接受日期:1900-01-01 出版日期:2014-10-05

Study of cleanliness of high nitrogen steel in ESR

  • Accepted:1900-01-01 Online:2014-10-05

摘要: 对高氮钢电渣重熔前后夹杂物进行对比研究,分析不同渣系和自耗电极氧含量对重熔后夹杂物的影响。研究发现,不同渣系对电渣钢的洁净度影响很大,适当提高w(CaO)/ w(Al2O3)可有效降低电渣锭中的夹杂物和全氧量。不同氧含量的自耗电极进行重熔后,电渣锭全氧量w(T.O)及夹杂物种类和组成成分差别不大,夹杂物成分中w(MnO)/w(MnO+Al2O3)≈0.23~0.32,自耗电极中的氧含量与电渣重熔的洁净度没有直接关系,采用氧质量分数为(40~100)×10-6的不同自耗电极,电渣重熔后氧质量分数始终保持在(20~30)×10-6

关键词: 夹杂物, 渣系, 全氧量, 洁净度

Abstract: Inclusions before and after ESR process were compared and the influence of two slag systems and oxygen content in consumable ingots were analyzed. The results show that different slag systems will affect the result of inclusions removal, higher w(CaO)/ w(Al2O3) will reduce the level of inclusion and total oxygen content. In ESR process, the sort and chemical composition of inclusion have no difference with different oxygen content in consumable ingots(in inclusions w(MnO)/w(MnO+Al2O3)≈0.23~0.32), which means oxygen content in consumable ingots have no direct relationship with cleanness of ESR ingots. Using consumable ingots, whose oxygen contents diverse from 40×10-6 to 100×10-6, both total oxygen contents after ESR are(20~30)×10-6.

Key words: inclusion, slag system, total oxygen content, cleanliness