摘要
为了掌握等通道转角分流宽展挤压铝合金的微观组织演变规律,以6005A铝合金为研究对象,以基于YADA再结晶方程的数学模型为基础,采用有限元分析和实验研究相结合的方法,对微观变形特征进行了研究。通过金相分析验证了模型的准确性,得到挤压过程中发生再结晶的体积分数、再结晶的晶粒尺寸及最终晶粒尺寸。研究结果揭示了6005A铝合金在热挤压过程中发生的晶粒细化现象,确定了特征点的演变规律,成功挤压了再结晶体积分数为100%、晶粒尺寸为15.75~19.92μm的板材。为实现铝合金等通道转角分流宽展挤压的微观预测奠定了基础。
In order to understand the microstructure evolution law of portholes-equal channel angular pressing spread extrusion aluminum alloy,for 6005A aluminum alloy,based on the mathematical model of recrystallization equation YADA,the micro deformation characteristics were studied by combining finite element analysis and experimental research.The accuracy of the model was verified by metallographic analysis,and the recrystallization volume fraction,recrystallized grain size and final grain size during the extrusion process were obtained.The research results reveal the grain refinement phenomenon of 6005A aluminum alloy during the hot extrusion process and determine the evolution law of characteristic points.Finally,the sheet with the recrystallization volume fraction of 100%and the grain size of 15.75-19.92μm are extruded sucessfully,which lays the foundation for the microstructural prediction of portholes-equal channel congular pressing spread extrusion.
作者
石磊
卢志文
李永兵
杨培源
柳翊
李小龙
陈学文
Shi Lei;Lu Zhiwen;Li Yongbing;Yang Peiyuan;Liu Yi;Li Xiaolong;Chen Xuewen(School of Materials Science and Engineering,Luoyang Institute of Science and Technology,Luoyang 471023,China;School of Materials Science and Engineering,Northwestern Polytechnical University,Xi′an 710072,China;Beijing National Innovation Institute of Lightweight Ltd.,Beijing 100083,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471000,China)
出处
《锻压技术》
北大核心
2025年第8期131-138,共8页
Forging & Stamping Technology
基金
河南省科技攻关项目(242102230066,242102231017,242102230047)。
关键词
6005A铝合金
等通道转角分流宽展挤压
热挤压
再结晶
微观组织
6005A aluminum alloy
portholes-equal channel angular pressing spread extrusion
hot extrusion
recrystallization
microstructure
