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首页> 外文期刊>ISIJ international >Effect of CaO–MgO–SiO2–Al2O3–TiO2 Slags with Different CaF2 Contents on Inclusions in Ti-Stabilized 20Cr Stainless Steel
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Effect of CaO–MgO–SiO2–Al2O3–TiO2 Slags with Different CaF2 Contents on Inclusions in Ti-Stabilized 20Cr Stainless Steel

机译：CaF 对CaO–MgO–SiO 2 -Al 2 O 3 -TiO 2 炉渣的影响钛稳定的20Cr不锈钢中> 2 夹杂物的含量

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Laboratory experiments and thermodynamic calculation for the Al-killed Ti-stabilized 20Cr stainless steel with several CaO–MgO–SiO_(2)–Al_(2)O_(3)–TiO_(2)–CaF_(2) slags containing different CaF_(2) contents were performed to investigate the effect of slag composition on inclusions in molten steel. The titanium and magnesium contents were higher in the steel samples reacted with the slag samples containing higher CaF_(2) contents. The thermodynamic results based on the ion and molecule coexistence theory (IMCT) also indicated that the log (α _(SiO_(2))/α _(TiO_(2))), log(α ~(2)_(Al_(2)O_(3))/α ~(3)_(TiO_(2))) and log(α _(Al_(2)O_(3))/α ~(3)_(MgO)) decrease with the increase of CaF_(2) content in slag, which would make the molten steels have higher titanium and magnesium content. The increase of magnesium content in steel due to the increase of CaF_(2) in slag led to the increase of MgO content of inclusions. Due to the highest CaF_(2) content in slag, some inclusions in the steel were located in (liquid + MgO + TiSp) phase field. Reducing the CaF_(2) content in slag to 5.18 mass%, the MgO content of inclusions in steel was reduced, which made most of the inclusions located in or close to liquid oxide phase field. The reasonable CaF_(2) content in slag was discussed with the consideration of controlling the titanium content and the formation of inclusions in molten steel.
机译：含有几种CaF _（-）的CaO–MgO–SiO_（2）–Al_（2）O_（3）–TiO_（2）–CaF_（2）炉渣的Al杀死的Ti稳定的20Cr不锈钢的室内实验和热力学计算。 2）进行内容物以研究炉渣成分对钢水中夹杂物的影响。与含较高CaF_（2）含量的炉渣样品反应后，钢样品中的钛和镁含量较高。基于离子和分子共存理论（IMCT）的热力学结果还表明，log（α_（SiO_（2））/ α_（TiO_（2））），log（ α〜（2）_（Al_（2）O_（3））/ α〜（3）_（TiO_（2）））和log（α_（Al_（2）O_（3） ）/ i〜（3）_（MgO））随着炉渣中CaF_（2）含量的增加而降低，这将使钢水的钛和镁含量更高。炉渣中CaF_（2）的增加导致钢中镁含量的增加，导致夹杂物中MgO含量的增加。由于炉渣中CaF_（2）含量最高，钢中的一些夹杂物位于（液相+ MgO + TiSp）相场中。通过将炉渣中的CaF_（2）含量降低至5.18质量％，钢中夹杂物的MgO含量降低，这使得大部分夹杂物位于或接近液相氧化物相场。讨论了炉渣中合理的CaF_（2）含量，同时考虑了控制钛含量和钢水中夹杂物的形成。

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