东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (10): 1445-1448.DOI: -

• 论著 • 上一篇    下一篇

精炼渣碱度对304不锈钢中夹杂物的影响

庄迎;姜周华;李阳;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-10-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50704010)

Effect of refining slag's basicity on inclusions in molten 304 stainless steel

Zhuang, Ying (1); Jiang, Zhou-Hua (1); Li, Yang (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-10-15 Published:2013-06-20
  • Contact: Zhuang, Y.
  • About author:-
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摘要： 实验室条件下模拟304不锈钢冶炼中的AOD工位,采用硅铁做终脱氧剂,选择CaO-SiO2-Al2O3-MgO-CaF2五元渣系,考察了精炼渣碱度对304不锈钢中夹杂物的影响.实验中发现,随精炼渣碱度的增大,钢中全氧质量分数降低,夹杂物的总数、总面积和平均半径减小,说明高碱度渣对304不锈钢中的脱氧产物吸附以及对细小夹杂物的生成有利;碱度大于2的精炼渣处理效果明显优于碱度为1.5的实验渣系,建议现场采用碱度大于2的渣系处理钢液.

关键词: 304不锈钢, 脱氧, 精炼渣, 碱度, 夹杂物

Abstract: The AOD process of the 304 stainless steel was simulated in lab, with the FeSi alloy taken as final deoxidant and the CaO-SiO2-Al2O3-MgO-CaF2 slag chosen as refining slag. Then, the effect of refining slag's basicity on the inclusions in the 304 stainless steel melts was investigated. The results showed that with the increasing basicity of refining slag the total mass fraction of oxygen decreases, as well as the total number, area and average size of inclusions. The fact means that the high basicity of slag benefits both the absorption of deoxidation products and the formation of fine inclusions. However, the effect of refining slag on the inclusions in molten steel revealed that a better result is available if the slag's basicity is 2 other than 1.5. So, it is recommended to taken the refining slag whose basicity should be greater than 2 in AOD process.

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