炼钢 ›› 2015, Vol. 31 ›› Issue (1): 48-51.

• 试验研究 • 上一篇    下一篇

顶渣成分对夹杂物塑性化的影响

辛彩萍   

  1. 北京科技大学冶金工程研究院
  • 收稿日期:2014-04-04 修回日期:2014-06-03 接受日期:1900-01-01 出版日期:2015-02-05 发布日期:2015-02-13
  • 通讯作者: 辛彩萍 E-mail:xin_caiping@126.com

The influence of top slag composition on plasticization of CaO-Al2O3-SiO2-MgO inclusions

  1. engineering research insititue of USTB
  • Received:2014-04-04 Revised:2014-06-03 Accepted:1900-01-01 Online:2015-02-05 Published:2015-02-13

摘要: 首先采用FactSage热力学软件对CaO-Al2O3-SiO2-MgO(10 %)系夹杂物的塑性化控制进行了讨论,并进行了顶渣成分对夹杂物成分影响的实验室和工业试验研究。研究表明:在CaO-Al2O3-SiO2-MgO(10 %)相图中,当w(CaO)=8 %~48 %,w(SiO2)=35 %~75 %,w(Al2O3)=0~32 %时,夹杂物处于塑性区域。随着顶渣中Al2O3含量的升高,帘线钢夹杂物中的Al2O3含量也随之升高,且夹杂物的分布也随顶渣中w(Al2O3)的升高而变得分散。综合实验室试验研究和工业试验生产结果,通过调节顶渣的成分,将顶渣碱度控制在0.7~0.9, w(Al2O3)s=2 %~5 %时,可控制钢中非金属夹杂物的塑性化,断丝率降低了30 %,达到了提高盘条质量的目的。

关键词: 帘线钢, 顶渣, 塑性, 夹杂物

Abstract: The generation plasticization control of CaO-Al2O3-SiO2-MgO inclusions was discussed by thermodynamic calculation, and the effect of the top slag composition on inclusions was studied in the lab and industry. As a result, in the CaO-Al2O3-SiO2-MgO(10 %) diagram, when w(CaO)=8 %~48 %, w(SiO2)=35 %~75 %, w(Al2O3)=0~32 %, inclusions were in plastic zone. With the increase of the content of Al2O3 in the slag, the content of Al2O3 in inclusions of tire cord steel increased. And the distribution of inclusions became scattered with the mass fraction of Al2O3 increasing in the slag. Combined with laboratory results and industrial trials, when the basicity of top slag between 0.7 and 0.9, w (Al2O3) s=2 %~5 %, the non-metallic inclusions in steel could be plastified and wire breaking reduced by 30 % through the composition of refining slag controlling, so as to the quality of wire rod improved.

Key words: tire cord steel, top slag, plasticity, inclusions