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首页> 外文期刊>Metallurgical and Materials Transactions B >Inclusion control of ferritic stainless steel by aluminum deoxidation and calcium treatment
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Inclusion control of ferritic stainless steel by aluminum deoxidation and calcium treatment

机译：铝脱氧钙处理控制铁素体不锈钢的夹杂物

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摘要

A thermodynamic equilibrium between aluminum and oxygen and inclusion morphology in the Fe-16Cr stainless steel were investigated to understand the fundamentals of the aluminum deoxidation technology for ferritic stainless steels. Further, the effect of calcium addition on the changes in chemistry and morphology of inclusions was discussed. The measured results for the aluminum-oxygen equilibria exhibit relatively good agreement with the calculated values, indicating that an introduction of the first-and second-order interaction parameters, recently reported, is reasonable to numerically express the aluminum deoxidation equilibrium in a ferritic stainless steel. In the composition of dissolved aluminum content greater than about 60 ppm, pure alumina particles were observed, while the alumino-manganese silicates containing Cr2O3 appeared at less than 20 mass ppm of dissolved aluminum. The formation of calcium aluminate inclusions after Ca treatment can be discussed based on the thermodynamic equilibria among calcium, aluminum, and oxygen in the steel melt. In the composition of steel melt with relatively high content of calcium and low aluminum, the log ( $X_{CaO} /X_{Al_2 O_3 } $ ) of inclusions linearly increases by increasing the log [a Ca/a Al 2 ·a O 2 ] with the slope close to unity. However, the slope of the line is significantly lower than the expected value in the composition of steel melt with relatively low calcium and high aluminum contents.
机译：研究了Fe-16Cr不锈钢中铝和氧之间的热力学平衡以及夹杂物形态，以了解铁素体不锈钢的铝脱氧技术的基本原理。此外，讨论了添加钙对夹杂物化学和形态变化的影响。铝-氧平衡的测量结果与计算值显示出相对较好的一致性，表明最近报道的引入一阶和二阶相互作用参数可以合理地数值表示铁素体不锈钢中的铝脱氧平衡。 。在溶解的铝含量大于约60ppm的组成中，观察到纯氧化铝颗粒，而含有Cr 2 O 3的铝锰硅酸盐的溶解铝含量小于20质量ppm。可以根据钢水中钙，铝和氧之间的热力学平衡来讨论Ca处理后铝酸钙夹杂物的形成。在钙含量较高且铝含量较低的钢水成分中，夹杂物的对数（$ X_ {CaO} / X_ {Al_2 O_3} $）通过增加log [a Ca / a Al而线性增加 2 ·a O 2 ]，斜率接近于1。然而，在具有相对较低的钙和较高的铝含量的钢熔体的组成中，线的斜率明显低于预期值。

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  • 来源
    《Metallurgical and Materials Transactions B》 |2005年第1期|67-73|共7页
  • 作者

    Joo Hyun Park; Sang-Beom Lee; Dong Sik Kim;

  • 作者单位

    the Stainless Steel Research Group Technical Research Laboratories POSCO 790-785 Pohang Korea;

    the Stainless Steel Research Group Technical Research Laboratories POSCO 790-785 Pohang Korea;

    the Stainless Steel Research Group Technical Research Laboratories POSCO 790-785 Pohang Korea;

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