首页|核电用钢淬火过程温度场-组织场数值模拟及试验研究

核电用钢淬火过程温度场-组织场数值模拟及试验研究

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为获得SA508Gr。4N钢末端淬火过程中温度场及组织场的变化规律，通过对非线性有限元模拟软件进行二次开发，建立SA508Gr。4N钢末端淬火过程中的温度-组织耦合的有限元模型，并通过实验对数值模拟结果进行验证。研究结果表明:所建立的温度-组织耦合模型计算结果与实验结果吻合良好，温度场的变化主要受综合换热系数影响;组织场模型适用于扩散型和非扩散型相变组织与维氏硬度的预测。随淬火端面的距离增大，试样组织呈现出由完全马氏体相到马氏体+贝氏体混合相的变化，维氏硬度逐渐降低，与温度-组织耦合模型计算得到的组织、硬度变化规律一致，因此，本文所提模型可以用于预测SA508Gr。4N钢末端淬火过程中温度场及组织场变化规律。
Numerical simulation and experimental study of temperature field and microstructure field during quenching of nuclear steel
In order to obtain the variation law of temperature and microstructure during end quenching of SA508Gr.4N steel,a finite element model of temperature-microstructure coupling during end quenching of SA508Gr.4N steel was established through the secondary development of nonlinear finite element simulation software,and the numerical simulation results were verified by experiments.The results show that the established temperature-microstructure coupling model calculation result is in good agreement with the experimental result,and the temperature field is mainly affected by the comprehensive heat transfer coefficient.The structure field model is suitable for predicting the microstructure and Vickers hardness of diffusive transformation and non-diffusive transformation.The microstructure of experimental sample changes from complete martensitic structure to martensitic+bainite mixed structure with the increase of the distance from the quenched end surface,and the Vickers hardness gradually decreases,which is consistent with the microstructure and hardness change law calculated by the temperature-microstructure coupling model.Thus,the proposed model can be used to predict the temperature field and microstructure field change law during the quenching process of SA508Gr.4N steel.

numerical simulationfinite element methodend quenchingSA508Gr.4N steel

陆书萌、万莉、郑善举、李萌蘖、徐忠东、王辉

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昆明理工大学材料科学与工程学院,云南昆明,650093

内蒙古中盛工程技术有限公司,内蒙古阿拉善,750300

数值模拟 有限元法 末端淬火 SA508Gr.4N钢

云南省"万人计划"青年拔尖人才资助项目昆明理工大学自然科学研究基金资助项目Yunnan Ten Thousand Talents Plan Young&Elite Talents ProgramNatural Science Research Foundation of Kunming University of Science and Technology

YNWR-QNBJ-2020-020KKZ3202051043

2024

10.11817/j.issn.1672-7207.2024.07.008

中南大学学报(自然科学版)
中南大学

中南大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.938
ISSN：1672-7207
年,卷(期)：2024.55(7)