ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2025, Vol. 46 ›› Issue (2): 67-71.DOI: 10.20057/j.1003-8620.2024-00208

• 冶炼与凝固 • 上一篇    下一篇

高硅控铝钢中铝含量与夹杂物成分控制

翟万里, 张洪才, 肖梦旋, 许正周   

  1. 江苏沙钢集团淮钢特钢股份有限公司,淮安 223002
  • 收稿日期:2024-08-19 出版日期:2025-03-30 发布日期:2025-03-13
  • 作者简介:翟万里(1984—),男,硕士,高级工程师;

Control Technology of Aluminum Content and Inclusion Composition in High-silicon and Aluminum-controlled Steel

Zhai Wanli, Zhang Hongcai, Xiao Mengxuan, Xu Zhengzhou   

  1. Jiangsu Shagang Group Huaigang Special Steel Stock Co.,Ltd., Huaian 223002, China
  • Received:2024-08-19 Published:2025-03-30 Online:2025-03-13

摘要: 通过工业试验研究了高硅控铝钢中Al含量、非金属夹杂物化学成分控制工艺,结果表明,采用碱度在1.5以下的低碱度渣系可将钢中w[Al]控制在0.004%以内,采用碱度2.5~3.5的高碱度渣系钢液w[Al]>0.006%。渣中Al2O3含量降低有利于抑制冶炼过程钢液增Al量。低碱度渣系钢中氧化物夹杂物成分为SiO2-MnO-Al2O3-MgO-CaO系,达到夹杂物塑性化的控制目的。高碱度渣系钢中氧化物夹杂成分为Al2O3含量较高的Al2O3-SiO2-MgO-CaO系,夹杂物塑性变形能力不足。虽然低碱度渣系在LF精炼过程脱氧能力不足,但经过RH真空处理后,仍然能得到w[O]<0.001 2%、夹杂物尺寸细小的高洁净度钢。

关键词: 炉渣碱度, Al含量, 夹杂物成分, 塑性夹杂

Abstract: In present paper,the control technology of aluminum content and inclusion composition was analyzed for high-silicon and aluminum-controlled steel by technological test. The results showed that content of Al in steel can be controlled within 0.0040% by using low basicity slag with alkalinity below 1.5,while the Al content is higher than 0.006% by using high basicity slag with basicity 2.5 - 3.5. The decrease of Al2O3 content in slag is beneficial to decrease the amount of Al increase in molten steel.The oxide inclusion component in low basicity slag steel is SiO2-MnO-Al2O3-MgO-CaO series , which achieves the control of inclusion plasticization. The oxide inclusion component in high basicity slag steel is Al2O3-SiO2-MgO-CaO series with high Al2O3 content, and the plastic deformation ability of the inclusion material is insufficient. High clean steel with oxygen content less than 0.001 2% and fine inclusions can be obtained after RH control processing, although deoxygenation effect of the steel with low basicity slag is poor in the refining process.

Key words: Slag Basicity, Aluminum Content, Composition of Inclusions, Plastic Inclusions

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