| 30CrNi3MoV钢动态再结晶行为及其模型的构建 |
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| 引用本文： | 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. |
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| 作者姓名： | 潘龙博 储滔 张硕 江济 程采金 谢庆忠 邢学强 斯庭智 |
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| 作者单位： | 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 |
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| 基金项目： | 安徽省重点研究和开发计划(1804a09020067) |
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| 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εc=0.001 22Z0.175;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。
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| 关 键 词： | 30CrNi3MoV钢 临界应变 动态再结晶 体积分数 晶粒尺寸 |
| 收稿时间： | 2021-02-12 |
Dynamic recrystallization behaviors of 30 CrNi3 MoV steel and its mathematical models |
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| Pan Longbo,Chu Tao,Zhang Shuo,Jiang Ji,Cheng Caijin,Xie Qingzhong,Xing Xueqiang,Si Tingzhi.Dynamic recrystallization behaviors of 30 CrNi3 MoV steel and its mathematical models[J].Heat Treatment of Metals,2021,46(7):23-30. |
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| Authors: | Pan Longbo Chu Tao Zhang Shuo Jiang Ji Cheng Caijin Xie Qingzhong Xing Xueqiang Si Tingzhi |
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| Affiliation: | 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 |
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| 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 beεc=0.001 22Z0.175. 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. |
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| Keywords: | 30CrNi3MoV steel critical strain dynamic recrystallization volume fraction grain size |
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