摘要
动态再结晶行为受应变量和应变速率的影响,与这两种变形参数表现出复杂的非线性关系。本文基于已建立的SAE5137H钢动态再结晶模型,在有限元模拟软件中建立了有限SAE 5137H钢的热-力耦合有限元模型;探究了热塑性变形过程中应变量(0.223、0.511、0.916)和应变速率(0.01s^(-1)、0.1s^(-1)、1s^(-1)、10s^(-1))对SAE 5137H钢动态再结晶行为的影响规律。结果表明:动态再结晶体积分数随着应变速率的增加而减小,随着应变量的增加而增大;平均晶粒尺寸随着应变速率的增加而先减小后增大,随着应变量的增加而减小;工件中心区域到外缘,动态再结晶体积分数逐渐减小,平均晶粒尺寸逐渐增大。
Dynamic recrystallization behavior is influenced by strain amount and strain rate,and exhibits a complex nonlinear relationship with these two deformation parameters.In this paper,based on the es-tablished dynamic recrystallization model of SAE 5137H steel,a finite thermal-force coupled finite ele-ment model of finite SAE 5137H steel was established in finite element simulation software;the effects of strain(0.223,0.511,0.916)and strain rate(0.01s^(-1),0.1s^(-1),1s^(-1),10s^(-1))on the dynamic recrystallization behavior of SAE 5137H steel on the dynamic recrystallization behavior.The results show that:the dy-namic recrystallization volume fraction decreases with the increase of strain rate and increases with the increase of strain;the average grain size first decreases and then increases with the increase of strain rate and decreases with the increase of strain;from the center region to the outer edge of the work-piece,the dynamic recrystallization volume fraction gradually decreases and the average grain size grad-ually increases.
作者
蒋倩
邓琦
赵一帆
权铭国
权国政
JIANG Qian;DENG Qi;ZHAO Yifan;QUAN Mingguo;QUAN GuoZheng(Jiangsu Engineering Research Center for Advanced Manufacturing of Ship Power System Components,Nanjing 211121,Jiangsu China;Nanjing COSCO Marine Equipment Parts Co.,Ltd.,Nanjing 211121,Jiangsu China;Chongqing University,Chongqing 400044,China)
出处
《锻压装备与制造技术》
2025年第2期107-110,共4页
China Metalforming Equipment & Manufacturing Technology
关键词
SAE5137H钢
动态再结晶
应变量
应变速率
有限元模拟
热压缩
SAE5137H steel
Dynamic recrystallization
Strain volume
Strain rate
Finite element simula-tion
Thermal compressionn
