V(C, N)在钒微合金钢中析出行为的热力学计算与试验分析

doi:10.13251/j.issn.0254-6051.2025.04.015

金属热处理 ›› 2025, Vol. 50 ›› Issue (4): 101-105.DOI: 10.13251/j.issn.0254-6051.2025.04.015

V(C, N)在钒微合金钢中析出行为的热力学计算与试验分析

孙希庆¹, 刘全彬¹, 李秋魁¹, 杨波³, 李春诚²

1.合众新能源汽车股份有限公司, 浙江桐乡 314500;
2.本钢集团有限公司技术中心, 辽宁本溪 117000;
3.辽宁科技学院冶金与材料工程学院, 辽宁本溪 117000

收稿日期:2024-11-04 修回日期:2025-02-10 发布日期:2025-06-13
通讯作者: 杨波,副教授,E-mail:boyangustb@163.com
作者简介:孙希庆(1984—),男,工程师,硕士,主要研究方向为金属材料激光焊接相关技术,E-mail:sunxiqing@hozonauto.com。

Thermodynamic calculation and experimental analysis on precipitation behavior of V(C, N) in vanadium microalloyed steels

Sun Xiqing¹, Liu Quanbin¹, Li Qiukui¹, Yang Bo³, Li Chuncheng²

1. Hozon New Energy Automobile Co., Ltd., Tongxiang Zhejiang 314500, China;
2. Technical Center, Bensteel Group Corporation, Benxi Liaoning 117000, China;
3. School of Metallurgy and Materials Engineering, Liaoning Institute of Science and Technology, Benxi Liaoning 117000, China

Received:2024-11-04 Revised:2025-02-10 Published:2025-06-13

摘要/Abstract

摘要： 利用FactSage软件进行热力学计算、制备添加和不添加0.05%V的试验钢,并使用扫描电镜和显微硬度计,研究了钒微合金钢中V(C, N)的析出规律。计算结果表明,随着V含量的增加,V(C, N)相析出量逐渐增加,V含量超过0.02%以后,V(C, N)相初始析出温度增加并不明显。经950 ℃淬火和550 ℃回火处理后,试验测得0.05%V微合金试验钢中V(C, N)相析出量最大,硬度达到最大值。随着模拟卷取温度降低,0.05%V试验钢硬度先增再降最后增大,硬相马氏体组织增加,但V(C, N)相析出量先增大后减少,400 ℃析出量达到峰值,可见试验钢的硬度受组织特征和析出相的共同影响。

关键词: V微合金钢, V含量, V(C, N)相, 硬度

Abstract: Precipitation behavior of V(C, N) in V-microalloyed steels was studied by calculation using FactSage thermodynamic software, and experiments on the tested steels with and without addition of 0.05%V by scanning electron microscope and microhardness tester. The calculation results indicate that the precipitation amount of V(C, N) phase increases gradually with the increase of V content, while when the V content exceeds 0.02%, the initial precipitation temperature of V(C, N) phase does not increase significantly. After quenching at 950 ℃ and tempering at 550 ℃, the measured precipitation amount of V(C, N) phase in the tested 0.05%V microalloyed steel is the largest, and the hardness reaches the maximum. With the decrease of simulated coiling temperature, the hardness of 0.05%V steel increases firstly, then decreases and finally increases, the hard phase martensite structure increases, but the precipitation amount of V(C, N) phase increases firstly and then decreases, and reaches the maximum at 400 ℃, indicating that the hardness of the tested steel is influenced by both the microstructure characteristics and precipitated phases.

Key words: V-microalloyed steels, V content, V(C, N) phase, hardness

中图分类号:

TG161

孙希庆, 刘全彬, 李秋魁, 杨波, 李春诚. V(C, N)在钒微合金钢中析出行为的热力学计算与试验分析[J]. 金属热处理, 2025, 50(4): 101-105.

Sun Xiqing, Liu Quanbin, Li Qiukui, Yang Bo, Li Chuncheng. Thermodynamic calculation and experimental analysis on precipitation behavior of V(C, N) in vanadium microalloyed steels[J]. Heat Treatment of Metals, 2025, 50(4): 101-105.

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V(C, N)在钒微合金钢中析出行为的热力学计算与试验分析

Thermodynamic calculation and experimental analysis on precipitation behavior of V(C, N) in vanadium microalloyed steels

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