锻压技术

铝合金等通道转角分流宽展挤压微观组织有限元分析

英文标题：Finite element analysis on microstructure in portholes-equal channel angular pressing spread extrusion for aluminium alloy

作者：石磊1 2 卢志文1 李永兵3 杨培源1 柳翊1 李小龙1 陈学文4

单位：1. 洛阳理工学院材料科学与工程学院 2．西北工业大学材料学院 3．北京机科国创轻量化科学研究院有限公司 4．河南科技大学材料科学与工程学院

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

分类号：TG376.2

出版年,卷(期):页码：2025,50(8):131-138

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15.75~19.92 μm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 15.75-19.92 μm are extruded sucessfully, which lays the foundation for the microstructural prediction of portholes-equal channel congular pressing spread extrusion.

基金项目：

河南省科技攻关项目（242102230066，242102231017，242102230047）

作者简介：石磊（1980-），男，博士，副教授 E-mail：shilei207207@163.com 通信作者：卢志文（1966-），男，博士，教授 E-mail：1796879656@qq.com

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