一种铁素体-奥氏体相变动力学模型

doi:10.12068/j.issn.1005-3026.2023.07.004

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (7): 938-943.DOI: 10.12068/j.issn.1005-3026.2023.07.004

一种铁素体-奥氏体相变动力学模型

蓝慧芳，柳泽阳，武梦如

(东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳110819)

发布日期:2023-07-13
通讯作者: 蓝慧芳
作者简介:蓝慧芳(1981-)，女，山东烟台人，东北大学副教授.
基金资助:
国家自然科学基金面上资助项目 (51774082).

A Kinetic Model for Ferrite-Austenite Transformation

LAN Hui-fang， LIU Ze-yang， WU Meng-ru

State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.

Published:2023-07-13
Contact: LAN Hui-fang
About author:-
Supported by:
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摘要/Abstract

摘要： 基于混合模型及吉布斯能量平衡模型思想，建立了一种简单的吉布斯能量平衡模型，应用于Fe-C-Mn低碳钢在780℃两相区等温过程中的铁素体向奥氏体相变模拟，并分析了三种吉布斯自由能、有效晶粒尺寸、元素分布等对相变的影响.结果表明，有效晶粒尺寸及界面迁移率影响相变速率，但对最终奥氏体体积分数无影响；相变过程中相界面处锰元素的富集导致的能量耗散同时降低了相变速率及最终奥氏体体积分数.对模拟结果进行实验验证，表明模拟结果与实验结果吻合良好.

关键词: 相变动力学；吉布斯能量平衡；铁素体-奥氏体相变；溶质拖曳效应

Abstract: In this paper，based on the concepts of mixed model and Gibbs energy balance model， a simple Gibbs energy balance model was established to simulate the ferrite-austenite transformation of Fe-C-Mn low carbon steel during the intercritical annealing at 780℃. The effects of Gibbs free energy， effective grain size and alloying distribution on the transformation were studied. The results show that the initial effective grain size and interfacial mobility greatly affected the kinetics of phase transformation， while they had little effect on the final volume fraction of the austenite. The dissipation energy caused by the Mn enrichment at the interface during phase transformation slowed down the transformation kinetics and reduced the final volume fraction of the austenite. It is found that the modelling results above are in good accordance with the experimental ones.

Key words: phase transformation kinetics； Gibbs energy balance； ferrite-austenite transformation； solute drag effect

中图分类号:

TG111.5

蓝慧芳，柳泽阳，武梦如. 一种铁素体-奥氏体相变动力学模型[J]. 东北大学学报（自然科学版）, 2023, 44(7): 938-943.

LAN Hui-fang， LIU Ze-yang， WU Meng-ru. A Kinetic Model for Ferrite-Austenite Transformation[J]. Journal of Northeastern University(Natural Science), 2023, 44(7): 938-943.

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一种铁素体-奥氏体相变动力学模型

A Kinetic Model for Ferrite-Austenite Transformation

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