硫含量对连铸 20CrMnTi 齿轮钢中树枝状硫化物夹杂物析出行为的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-31 DOI:10.1002/srin.202400587

Qiu‐wei Zheng, Xiao‐yong Gao, Li‐feng Zhang

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引用次数: 0

摘要

研究了硫含量对连铸 20CrMnTi 齿轮钢中硫化物夹杂和树枝状 MnS 的影响。20CrMnTi 钢中的硫化物主要有两种：纯 MnS 和 TiN-MnS 复合夹杂物。TiN-MnS 的数量高于 MnS，尤其是在钢坯边缘。TiN-MnS 的面积和尺寸均小于纯 MnS。树枝状 MnS 的统计结果表明，S 含量的增加会减小硫化物的平均尺寸，但会增加硫化物的数量和最大尺寸。随着 S 含量的增加，钢中大尺寸枝晶 MnS 的比例降低，但大尺寸枝晶 MnS 的数量增加，从而导致大尺寸枝晶 MnS 的数量增加。树枝状 MnS 包裹体的平均面积从钢坯边缘到中心先增大后减小，最大面积出现在钢坯半径的 1/2 处。对比两种坯料的微观结构，铁素体的比例随着 S 含量的增加而增加。

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Effect of Sulfur Content on Precipitation Behavior of Dendrite Sulfide Inclusion in Continuous Casted 20CrMnTi Gear Steel

The effect of sulfur content on sulfide inclusion and dendrite MnS in continuous casted 20CrMnTi gear steel is investigated. There are two main types of sulfides in 20CrMnTi steel: pure MnS and TiN–MnS composite inclusions. The number of TiN–MnS is higher than MnS, especially in the edge of the billet. TiN–MnS is smaller both in area and size than pure MnS. The statistical results of dendrite MnS show that the increase of S content decreases the average size of sulfides, whereas raises the number and the maximum size of sulfides. With the S content increasing, the proportion of large‐sized dendrite MnS in steel decreases, but the amount of large‐sized dendrite MnS increases, which results in the increase of number of large‐sized dendrite MnS. The average area of dendrite MnS inclusions first increased and then decreased from the edge to the center of billet, and the maximum area appeared at about 1/2 radius of the billet. Comparison with the microstructure of the two billets, the proportion of ferrite increased with the increase of S content.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.