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<p>The patterns of austenite grain growth in the structure of high-carbon Fe – C – Nb steels of various compositions and different states of precipitates containing Nb were studied. The morphology of primary austenite and distribution of precipitates at temperatures of 1050 – 1200°C are analyzed. It is found that in steel not containing Si and Mn, when the temperature increases above 1100°C, precipitates dissolve and become larger, resulting in growth of austenite grain. It is shown that an increase in the Nb content in steel and refinement of precipitates in its structure contribute to effective inhibition of austenite grain growth during reheating. In addition, steel containing Si and Mn is not prone to austenite grain growth.</p>

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Effect of Solute Atoms and Precipitates on Austenite Grain Growth in Fe – C – Nb Steel

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Chao Lu,
  • Jianchun Cao,
  • Xing Liu,
  • Weinan Zhao,
  • Jiao Xu

摘要

The patterns of austenite grain growth in the structure of high-carbon Fe – C – Nb steels of various compositions and different states of precipitates containing Nb were studied. The morphology of primary austenite and distribution of precipitates at temperatures of 1050 – 1200°C are analyzed. It is found that in steel not containing Si and Mn, when the temperature increases above 1100°C, precipitates dissolve and become larger, resulting in growth of austenite grain. It is shown that an increase in the Nb content in steel and refinement of precipitates in its structure contribute to effective inhibition of austenite grain growth during reheating. In addition, steel containing Si and Mn is not prone to austenite grain growth.