Effect of NbC on Heterogeneous Nucleation and Grain Refinement of HRB500 Reinforcement during Solidification

被引：0
|
作者：
Xiong X. [1 ,2 ]
Li C. [1 ,2 ]
Zhuang C. [1 ,2 ]
Li Z. [1 ,2 ]
Wang J. [3 ]
机构：
[1] College of Materials and Metallurgy, Guizhou University, Guiyang
[2] Guizhou Province Key Laboratory for Metallurgical Engineering and Process Energy Saving, Guizhou University, Guiyang
[3] Shougang Shuicheng Iron and Steel (Group) Co., Ltd., Liupanshui
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2022年 / 25卷 / 01期
关键词：
Grain refinement; Heterogeneous nucleation; Mechanical property; Precipitation strengthening;
D O I：
10.3969/j.issn.1007-9629.2022.01.010
中图分类号：
学科分类号：
摘要：
Based on the two‑dimensional mismatch theory, the relative nucleation phases γ‑Fe and α‑Fe on NbC were calculated. The precipitation strengthening, fine grain strengthening, cooling control effect, microstructure and mechanical properties of microalloyed steel containing niobium were studied by means of scanning electron microscope(SEM), transmission electron microscope (TEM), optical microscope (OM), dynamic thermal simulation transformation instrument and mechanical properties test. The results show that the effect of α‑Fe and NbC heterogeneous nucleation is better, but the effect of γ‑Fe and NbC heterogeneous nucleation is not ideal; in the continuous cooling process, the critical temperature of pearlite transformation is 1.5 ℃/s, and the critical temperature of bainite transformation is 5.0 ℃/s; the Nb containing HRB500 can effectively refine the grain size and improve the mechanical properties of microalloyed steel through appropriate controlled cooling process. © 2022, Editorial Department of Journal of Building Materials. All right reserved.
引用
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页码：68 / 73
页数：5
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