Evolution Pathway of Competitive Precipitation of Inclusions in Al–Ti‐Deoxidized Steel

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-08-30 DOI:10.1002/srin.202400500

Yuanyou Xiao, Lei Cao, Guocheng Wang, Daxian Zhang, Jianzhong He

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Abstract

Seven types of inclusions are observed in the Al‐deoxidized steel followed by Ti‐deoxidized steel, while ten types of inclusions are found in Al–Ti simultaneous deoxidized steel. Three special inclusions are only found in Al‐deoxidized steel followed by Ti‐deoxidized steel as Al2TiO5–TixOy, Al2TiO5–Al2O3–TiS, and Al2TiO5–Al2O3–TixOy–TiS. The precipitation order of inclusions in Al–Ti‐deoxidized steel is very dependent on the value of [%Ti]/[%Al] or [%S]/[%O]. The critical value of [%Ti]/[%Al] for the precipitation of inclusions from large to small is TixOy > Al2TiO5 > Al2O3, and the critical value of [%S]/[%O] for the precipitation of inclusions from large to small is TiS > TixOy. The critical value of [%Ti]/[%Al] for the precipitation of TixOy prior to Al2TiO5, and the precipitation of Al2TiO5 prior to Al2O3 has a close relationship with the content of [%Al]. In addition, the critical value of [%S]/[%O] for the precipitation of TiS prior to TixOy inclusions increases with an increasing content of [%O] and increased with the decreasing of temperature. The precipitation order of inclusions in the two types of steel is Al2TiO5 or Al2O3 → Ti3O5 → TiO2 → Ti2O3 → TiS.

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铝钛脱氧钢中夹杂物竞争性沉淀的演变途径

在铝脱氧钢和钛脱氧钢中发现了七种夹杂物，而在铝钛同时脱氧钢中发现了十种夹杂物。三种特殊夹杂物仅出现在铝脱氧钢中，其次是钛脱氧钢，分别为 Al2TiO5-TixOy、Al2TiO5-Al2O3-TiS 和 Al2TiO5-Al2O3-TixOy-TiS。铝钛氧化钢中夹杂物的析出顺序与[%Ti]/[%Al]或[%S]/[%O]的值有很大关系。夹杂物从大到小析出的[%Ti]/[%Al]临界值为 TixOy > Al2TiO5 > Al2O3，夹杂物从大到小析出的[%S]/[%O]临界值为 TiS > TixOy。在 Al2TiO5 之前析出 TixOy 的[%Ti]/[%Al]临界值和在 Al2O3 之前析出 Al2TiO5 的[%Al]临界值与[%Al]含量有密切关系。此外，TiS先于TixOy夹杂物析出的临界值[%S]/[%O]随[%O]含量的增加而增加，并随温度的降低而增加。两种钢中夹杂物的析出顺序为 Al2TiO5 或 Al2O3 → Ti3O5 → TiO2 → Ti2O3 → TiS。

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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.

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