Transfer of rare earth to alloy and inclusion during slag-metal reaction
Transfer of rare earth to alloy and inclusion during slag-metal reaction
复制标题
DOI：
10.1051/metal/2021057
复制
发表时间：
2021
影响因子：
1.1
通讯作者：
Xiaoyong Gao;Lin Zhang;Lifeng Zhang;Q. Ren;X. Qu
中科院分区：
文献类型：
--
作者：
Xiaoyong Gao;Lin Zhang;Lifeng Zhang;Q. Ren;X. Qu
采用渣金属反应法研究了稀土金属从渣向合金和夹杂物的转移。以稀土氧化物（CeO2）为例进行了研究。结果表明，在渣中直接添加稀土氧化物可以替代传统的用纯稀土金属或稀土铁合金在合金中添加稀土的方法。炉渣-金属反应法是提高稀土从炉渣向高铝合金转移的有效途径。随着炉渣CeO2/Al2O3质量比的增加，合金中Ce的含量增加。随着合金熔液Ce浓度从0 ~ 105 ppm增加，Al2O3型夹杂物转变为氧化铈、硫化铈和氧硫化铈夹杂物。夹杂物的形貌由不规则向近球形转变。最后，通过热力学分析对其机理进行了探讨。
Rare earth metal transfer from slag to alloy and inclusion was investigated by slag-metal reaction method. Rare earth oxide (CeO2) employed in the refining slags was used a sample case. The results show that direct application of rare earth oxide in the slag is an alternative to traditional way which uses pure rare earth metal or rare-earth ferrous alloy to add rare earth in an alloy. Slag-metal reaction method proves to be an effective way to improve the rare earth transfer from slags to alloys with high content of Al. The content of Ce in the alloy increased with the increasing CeO2/Al2O3 mass ratio of the slag. As the Ce concentration of molten alloy increased from 0 to 105 ppm, the Al2O3 type inclusion was changed into cerium oxide, cerium sulfide and cerium oxy-sulfide inclusions. In addition, the morphology of inclusions was transformed from irregular to near spherical. Finally, the mechanism was discussed by thermodynamic analysis.