Effect of rare earth on inclusion evolution in industrial production of HRB500E steel

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI:10.1051/METAL/2021022

Jian Kang, Yan-chong Yu, Zhang Jinling, Chao Chen, She-bin Wang

引用次数: 5

Abstract

The effect of rare earth (RE) on inclusion in HRB500E steel was studied based on plant trials. The results showed that S decreased by 47.6% after 0.0059% RE treatment. In samples without RE treatment, the inclusions change from Al2O3-MnO to ellipsoidal Al2O3-MnO-CaO complex inclusion, and the size of such inclusions is ≤ 2 µm and isolated strip MnS inclusion with the size of ≥ 2 µm. With RE treatment, Al2O3-MnO-CaO inclusions are transformed into spherical or ellipsoidal REAlO3 and REAlO3-MnS. The size of such inclusions is ≈ 1.5 µm and single MnS inclusions were not found. The number density and size of inclusions changed significantly after RE treatment. Thermodynamic calculations show that the Gibbs free energy of RE inclusions is more negative and more stable. The transformation model of inclusions is established to illustrate the modification of inclusions during the smelting process.

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稀土对HRB500E钢工业生产中夹杂物演化的影响

通过现场试验，研究了稀土对HRB500E钢夹杂物的影响。结果表明:0.0059% RE处理后S降低47.6%;在未进行RE处理的样品中，包裹体由Al2O3-MnO变为椭圆形Al2O3-MnO- cao络合物包裹体，包裹体尺寸≤2µm，孤立条形MnS包裹体尺寸≥2µm。稀土处理后，Al2O3-MnO-CaO包裹体转变为球形或椭球状的REAlO3和REAlO3- mns。这些包裹体的尺寸为≈1.5µm，未发现单个MnS包裹体。稀土处理后，夹杂物的数量、密度和大小发生了显著变化。热力学计算表明，稀土包裹体的吉布斯自由能更负且更稳定。为了说明熔炼过程中夹杂物的变化，建立了夹杂物的转化模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Metallurgical Research & Technology METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.70

自引率

9.10%

发文量

审稿时长

4.4 months

期刊介绍： Metallurgical Research and Technology (MRT) is a peer-reviewed bi-monthly journal publishing original high-quality research papers in areas ranging from process metallurgy to metal product properties and applications of ferrous and non-ferrous metals and alloys, including light-metals. It covers also the materials involved in the metal processing as ores, refractories and slags. The journal is listed in the citation index Web of Science and has an Impact Factor. It is highly concerned by the technological innovation as a support of the metallurgical industry at a time when it has to tackle severe challenges like energy, raw materials, sustainability, environment... Strengthening and enhancing the dialogue between science and industry is at the heart of the scope of MRT. This is why it welcomes manuscripts focusing on industrial practice, as well as basic metallurgical knowledge or review articles.