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Argon–Oxygen Decarburization of High‐Manganese Steels: Effect of Alloy Composition
Steel Research International ( IF 1.9 ) Pub Date : 2020-10-14 , DOI: 10.1002/srin.202000480 Aliyeh Rafiei 1 , Gordon A. Irons 1 , Kenneth S. Coley 2
Steel Research International ( IF 1.9 ) Pub Date : 2020-10-14 , DOI: 10.1002/srin.202000480 Aliyeh Rafiei 1 , Gordon A. Irons 1 , Kenneth S. Coley 2
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The kinetics of simultaneous decarburization and demanganization of Fe–Mn–C alloys with 5–25% Mn and 0.05–0.42%C are investigated by bubbling a mixture of Ar–O2 through the melt at 1823 K. There are three distinct stages during the process. In stage 1, the rate of decarburization is slow, it is faster in stage 2, and slows to an intermediate rate during stage 3. In stage 1, manganese concentration decreases at a constant rate. In stage 2, manganese concentration remains essentially constant or exhibits minor reversion in some cases. In stage 3, manganese concentration decreases again. The overall rate of manganese loss in stage 1 increases with decreasing initial carbon concentration of the alloy, whereas in stage 3, the rate of manganese loss is independent of carbon concentration. The rate of overall manganese loss is partly controlled by the transport of manganese in the liquid phase. Assuming the products of reaction are CO and MnO, the combination of loss as vapor and oxide is insufficient to justify the total Manganese loss. The mechanism for the extra manganese loss is proposed to be due to evaporation–condensation of manganese in the bubble, is supported both thermodynamically and kinetically.
中文翻译：
高锰钢的氩氧脱碳：合金成分的影响
通过鼓泡Ar–O 2的混合物，研究了Mn–5–25％和0.05–0.42％C的Fe–Mn–C合金同时脱碳和脱锰的动力学。通过1823 K熔体。在此过程中分为三个不同的阶段。在第1阶段，脱碳速率缓慢，在第2阶段，脱碳速率更快，在第3阶段，脱碳速率降至中等速率。在第1阶段，锰浓度以恒定速率降低。在阶段2中，锰的浓度基本保持恒定或在某些情况下表现出较小的回复。在阶段3中，锰浓度再次降低。随着合金初始碳浓度的降低，阶段1中的锰损失总速率增加，而在阶段3中，锰损失的速率与碳浓度无关。锰的总损失率部分地由液相中锰的运输控制。假设反应的产物是CO和MnO，蒸气和氧化物损失的组合不足以证明锰的总损失是合理的。提出额外的锰损失的机理是由于气泡中锰的蒸发-冷凝，在热力学和动力学上都得到了支持。
更新日期：2020-10-14
中文翻译：
高锰钢的氩氧脱碳：合金成分的影响
通过鼓泡Ar–O 2的混合物，研究了Mn–5–25％和0.05–0.42％C的Fe–Mn–C合金同时脱碳和脱锰的动力学。通过1823 K熔体。在此过程中分为三个不同的阶段。在第1阶段，脱碳速率缓慢，在第2阶段，脱碳速率更快，在第3阶段，脱碳速率降至中等速率。在第1阶段，锰浓度以恒定速率降低。在阶段2中，锰的浓度基本保持恒定或在某些情况下表现出较小的回复。在阶段3中，锰浓度再次降低。随着合金初始碳浓度的降低，阶段1中的锰损失总速率增加，而在阶段3中，锰损失的速率与碳浓度无关。锰的总损失率部分地由液相中锰的运输控制。假设反应的产物是CO和MnO，蒸气和氧化物损失的组合不足以证明锰的总损失是合理的。提出额外的锰损失的机理是由于气泡中锰的蒸发-冷凝，在热力学和动力学上都得到了支持。
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