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Improved Slags for ESR Processing of High-Carbon Chromium Bearing Steel

机译:用于高碳铬轴承钢的ESR处理的改进渣

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摘要

Freckles severely affect the quality of high-carbon chromium bearing steel ingots produced by electro-slag remelting (ESR). With conventional slags, reducingthe melt rate of the electrode can prevent freckle formation, but severe surface defects can still occur. In order to design an appropriate slag for control of segregation and also improve the surface quality of the ingots, the melting temperature, heat transfer properties, and viscosity of several synthetic slags based on the system CaF_2-CaO-Al_2O_3-MgO were evaluated. As a consequence of the laboratory investigation, a slag with 50% CaF_2 and a CaO/Al_2O_3 ratio of 1.5, was selected as a candidate for validation on ESR production facilities based on the following package of attractive properties: low melting temperature, low break temperature, low viscosity and high thermal conductivity. Following evaluation of the selected slag formulation on full-scale plant trials, HSLA steel ingots were produced that were free from freckles and exhibited good surface quality.
机译:雀斑严重影响通过电渣重熔(ESR)生产的高碳铬轴承钢锭的质量。使用传统的炉渣,降低电极的熔化速率可以防止形成雀斑,但是仍然会出现严重的表面缺陷。为了设计合适的炉渣以控制偏析并改善铸锭的表面质量,基于CaF_2-CaO-Al_2O_3-MgO体系对几种合成炉渣的熔融温度,传热性能和粘度进行了评估。实验室调查的结果是,基于以下诱人的特性:低熔化温度,低断裂温度,选择了具有50%CaF_2和CaO / Al_2O_3比为1.5的炉渣作为ESR生产设备验证的候选材料。 ,低粘度和高导热性。在全面的工厂试验中对选定的炉渣配方进行评估后,生产出不含雀斑且具有良好表面质量的HSLA钢锭。

著录项

  • 来源
    《ISIJ international》 |2017年第2期|322-328|共7页
  • 作者单位

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 China,Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario M5S 3E4 Canada;

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

    Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario M5S 3E4 Canada;

    Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario M5S 3E4 Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    electroslag remelting; heat transfer; viscosity; freckles; surface quality;

    机译:电渣重熔传播热量;粘度雀斑表面质量;

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