30CrNi3MoV钢动态再结晶行为及其模型的构建

doi:10.13251/j.issn.0254-6051.2021.07.005

金属热处理 ›› 2021, Vol. 46 ›› Issue (7): 23-30.DOI: 10.13251/j.issn.0254-6051.2021.07.005

30CrNi3MoV钢动态再结晶行为及其模型的构建

潘龙博¹, 储滔², 张硕¹, 江济¹, 程采金¹, 谢庆忠¹, 邢学强¹, 斯庭智²

1.安徽马钢重型机械制造有限公司, 安徽马鞍山 243000;
2.安徽工业大学材料科学与工程学院, 安徽马鞍山 243002

收稿日期:2021-02-12 出版日期:2021-07-25 发布日期:2021-12-10
通讯作者: 斯庭智,教授,博士,E-mail:tzsiahut@163.com
作者简介:潘龙博(1980—),男,主要研究方向为钢铁材料,E-mail:mgzjcxy@163.com。
基金资助:
安徽省重点研究和开发计划(1804a09020067)

Dynamic recrystallization behaviors of 30CrNi3MoV steel and its mathematical models

Pan Longbo¹, Chu Tao², Zhang Shuo¹, Jiang Ji¹, Cheng Caijin¹, Xie Qingzhong¹, Xing Xueqiang¹, Si Tingzhi²

1. Ma Steel Heavy Machinery Manufacturing Company of Anhui, Maanshan Anhui 243000, China;
2. School of Materials Science and Engineering, Anhui University of Technology, Maanshan Anhui 243002, China

Received:2021-02-12 Online:2021-07-25 Published:2021-12-10

摘要/Abstract

摘要： 根据Gleeble-3500热模拟试验机测量30CrNi3MoV钢的真应力-真应变曲线,系统研究了应变速率为0.01、0.1 s^-1时钢材的动态再结晶行为,并构建了其动态再结晶模型。结果表明:30CrNi3MoV钢在高温小应变速率下更容易发生动态再结晶,其热变形激活能为328.2 kJ/mol;通过加工硬化率随流变应力变化曲线(θ-σ)的拐点确定临界应变,可得动态再结晶临界应变方程为ε_c=0.001 22Z^0.175;构建的动态再结晶体积分数及其平均晶粒尺寸模型能够较好地预测试验钢的动态再结晶体积分数及其晶粒尺寸;当应变速率为0.1 s^-1、变形温度为1050 ℃时,试验钢的晶粒最细小、均匀,平均晶粒尺寸约为19.9 μm。

关键词: 30CrNi3MoV钢, 临界应变, 动态再结晶, 体积分数, 晶粒尺寸

Abstract: On the basis of the measured true stress-true strain curves of the 30CrNi3MoV steel by Gleeble-3500 thermal-mechanical simulator, the dynamic recrystallization behaviors and mathematical models were studied for the 30CrNi3MoV steel with strain rates of 0.01 and 0.1 s^-1. It is found that the dynamic recrystallization of the 30CrNi3MoV steel is easy to occur at high temperature and low strain rate, and the hot deformation activation energy is obtained to be 328.2 kJ/mol. According to the critical strain determined by the inflection point of work hardening rate versus flow stress curve (θ-σ), the critical strain equation of dynamic recrystallization is established to beε_c=0.001 22Z^0.175. The predicted values by the constructed dynamic recrystallization volume fraction and average grain size models are in good agreement with the experimental values. At the strain rate of 0.1 s^-1 and the deformation temperature of 1050 ℃, fine uniform grains with the average grain size of about 19.9 μm can be obtained in the 30CrNi3MoV steel.

Key words: 30CrNi3MoV steel, critical strain, dynamic recrystallization, volume fraction, grain size

中图分类号:

TG142.1⁺2

潘龙博, 储滔, 张硕, 江济, 程采金, 谢庆忠, 邢学强, 斯庭智. 30CrNi3MoV钢动态再结晶行为及其模型的构建[J]. 金属热处理, 2021, 46(7): 23-30.

Pan Longbo, Chu Tao, Zhang Shuo, Jiang Ji, Cheng Caijin, Xie Qingzhong, Xing Xueqiang, Si Tingzhi. Dynamic recrystallization behaviors of 30CrNi3MoV steel and its mathematical models[J]. Heat Treatment of Metals, 2021, 46(7): 23-30.

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30CrNi3MoV钢动态再结晶行为及其模型的构建

Dynamic recrystallization behaviors of 30CrNi3MoV steel and its mathematical models

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