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Experimental Measurements and Numerical Analysis of Al Deoxidation Equilibrium of Molten Fe–Cr–Ni Alloy
ISIJ International ( IF 1.8 ) Pub Date : 2021-09-15 , DOI: 10.2355/isijinternational.isijint-2020-710
Hiroshi Fukaya 1 , Seika Nakajima 2 , Jonah Gamutan 3 , Shigeru Suzuki 1 , Koji Kajikawa 1 , Ken Saito 4 , Takahiro Miki 3
Affiliation  

The aluminum deoxidation equilibrium in molten Fe-10 to 40mass%Cr-8mass%Ni and Fe-18mass%Cr-8 to 30mass%Ni alloys was experimentally determined at 1873 K and 1773 K to obtain the thermodynamic parameters at both temperatures, corresponding to the refining and casting processes, respectively. Thermodynamic analysis on Al deoxidation was carried out based on the sub-regular solution model using a Redlich–Kister type polynomial. Fe–Al, Ni–Al, Cr–Al and Fe–Cr–Ni interaction parameters were obtained from experimental results and a thermodynamic assessment. Using these parameters, the Al deoxidation equilibrium over the complete composition range of the Fe–Ni alloy and in more than 50mass%Fe of the Fe–Cr and Fe–Cr–Ni alloys can be calculated for the temperature ranges of both of the refining and casting processes.

Calculated logK’ of the Al deoxidation equilibrium of the Fe–Cr–Ni system at liquidus temperatures. Fullsize Image


中文翻译:

熔融Fe-Cr-Ni合金Al脱氧平衡的实验测量和数值分析

在 1873 K 和 1773 K 下实验确定了熔融 Fe-10 至 40mass%Cr-8mass%Ni 和 Fe-18mass%Cr-8 至 30mass%Ni 合金中的铝脱氧平衡,以获得两种温度下的热力学参数,对应于分别是精炼和铸造工艺。铝脱氧的热力学分析是基于使用 Redlich-Kister 型多项式的亚正则溶液模型进行的。Fe-Al、Ni-Al、Cr-Al 和 Fe-Cr-Ni 相互作用参数从实验结果和热力学评估中获得。使用这些参数,可以计算两种精炼温度范围内在 Fe-Ni 合金的整个成分范围内以及超过 50mass%Fe 的 Fe-Cr 和 Fe-Cr-Ni 合金中的 Al 脱氧平衡和铸造工艺。

Fe-Cr-Ni 系统在液相线温度下的 Al 脱氧平衡的 计算 log K '。全尺寸图像
更新日期:2021-09-15
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