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首页> 外文会议>Proceedings of the 3rd Pan American materials congress >Study on Adjustment and Optimization of LF Refining Slag of Spring Steel 55SiCrA
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Study on Adjustment and Optimization of LF Refining Slag of Spring Steel 55SiCrA

机译：弹簧钢55SiCrA的LF精炼渣的调整与优化研究

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摘要

The spring steel 55SiCrA produced in a domestic steel factory is deoxidized by Si with "100 t EAF-LF-VD-CC". The fluoric content (CaF_2 = 17.41-22.15%) and the binary basicity (R = 1.9-3.0) of applied LF refining slag are high. To avoid environmental pollution caused by fluorine, meanwhile guarantee the speed of melting slag and smelting effect on molten steel, the structure of refining slag was adjusted. A new fluorine-free slag system was obtained by changing slagging process, adjusting adding amounts of slag-making materials, such as lime, calcium carbide, silicon carbide and so on. This new fluorine-free slag was applied in industrial tests. The results showed that this new fluorine-free slag could meet smelting demands well. The average mass fraction of oxygen content of spring steel 55SiCrA billets could decreased from 11 × 10~(-6) to 9 × 10~(-6) and the plasticity of inclusions also changed better. All compositions of observed inclusion in billets were within the 1400 ℃ liquidus in Al_2O_3-SiO_2-Ca0-Mg0-Mn0 phase diagram.
机译：用100 t EAF-LF-VD-CC用Si对国内钢铁厂生产的弹簧钢55SiCrA进行脱氧。所施加的LF精炼炉渣中的氟含量（CaF_2 = 17.41-22.15％）和二元碱度（R = 1.9-3.0）很高。为避免氟引起的环境污染，同时保证了熔渣的速度和对钢水的熔炼效果，调整了精炼渣的结构。通过改变排渣工艺，调节石灰，电石，碳化硅等制渣材料的添加量，获得了一种新型的无氟渣系统。这种新的无氟炉渣已用于工业测试。结果表明，该新型无氟矿渣能很好地满足冶炼要求。弹簧钢55SiCrA钢坯的平均氧含量可以从11×10〜（-6）降低到9×10〜（-6），夹杂物的塑性也更好。在Al_2O_3-SiO_2-Ca0-Mg0-Mn0相图中，观察到的方坯中所有夹杂物的所有成分都在1400℃液相线内。

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  • 来源
  • 会议地点 San Diego(US)
  • 作者

    Chao Gu; Yan-ping Bao; Lu Lin; Min Wang; Li-hua Zhao; Zi-xuan Wu;

  • 作者单位

    State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing, Beijing 100083, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Spring steel 55SiCrA; LF refining slag; Fluorine-free;

    机译：弹簧钢55SiCrA; LF精炼渣；无氟;

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