[1]罗际韬,孙志超,赵志龙.均匀化炉冷态2014铝合金热变形获得回复组织的工艺参数确定[J].中国材料进展,2025,44(12):1153-1161.[doi:10.7502/j.issn.1674-3962.202404033]
　LUO Jitao,SUN Zhichao,ZHAO Zhilong.Determination of Process Parameters to Obtain Recovery Microstructure in Hot Deforming of 2014 Aluminum Alloy after the Pretreatment of Homogenization by Furnace Cooling[J].MATERIALS CHINA,2025,44(12):1153-1161.[doi:10.7502/j.issn.1674-3962.202404033]
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均匀化炉冷态2014铝合金热变形获得回复组织的工艺参数确定()

中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
44
期数:
2025年12
页码:
1153-1161
栏目:
出版日期:
2025-12-30

文章信息/Info

Title:
Determination of Process Parameters to Obtain Recovery Microstructure in Hot Deforming of 2014 Aluminum Alloy after the Pretreatment of Homogenization by Furnace Cooling
文章编号:
1674-3962(2025)12-1153-09
作者:
罗际韬; 孙志超; 赵志龙
西北工业大学材料学院，陕西 西安 710072
Author(s):
LUO Jitao; SUN Zhichao; ZHAO Zhilong
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
关键词:
2014铝合金; 热变形行为; 热加工图; 显微组织
Keywords:
2014 aluminum alloy;  hot deformation behavior;  hot processing map;  microstructure
分类号:
TG319
DOI:
10.7502/j.issn.1674-3962.202404033
文献标志码:
A
摘要:
均匀化炉冷预处理可提高2014铝合金组织均匀性、降低变形抗力，但热变形时易诱发动态再结晶，降低断裂和腐蚀性能，如何实现其回复变形、获得均匀的亚晶组织亟待解决。采用热模拟压缩实验，研究了均匀化炉冷预处理2014铝合金在变形温度370~490 ℃、应变速率01~10 s-1下的热变形特征，获得了变形温度、应变速率和变形量对动态再结晶体积分数、晶粒尺寸及形貌的影响规律。结果表明：提高变形温度会导致平均晶粒尺寸和再结晶体积分数均增大，提高应变速率会导致平均晶粒尺寸和再结晶体积分数均减小，提高变形量会导致再结晶体积分数增大、平均晶粒尺寸减小。建立了2014铝合金的热加工图，确定了回复变形为主的热加工参数区间：变形温度380 ℃～460 ℃，应变速率小于6 s-1，并通过反挤压工艺实验验证了其可行性。
Abstract:
The pretreatment of homogenization by furnace cooling can improve the microstructure uniformity and reduce the deformation resistance of 2014 aluminum alloy, but it is easy to induce dynamic recrystallization during hot deformation, thus reduce the alloy fracture and corrosion properties. How to realize its recovery deformation and obtain uniform subgrain structure needs to be solved urgently. In this paper, the hot deformation characteristics of homogenization furnace cold pretreated 2014 aluminum alloy at deformation temperature of 370~490 ℃ and strain rate of 0.1~10 s-1 were studied by thermal simulation compression experiment. The effects of deformation temperature, strain rate and deformation amount on dynamic recrystallization volume fraction, grain size and morphology were obtained. The experimental results showed that increasing deformation temperature would lead to the increase of average grain size and recrystallization volume fraction, increasing strain rate would lead to the decrease of average grain size and recrystallization volume fraction, and increasing deformation amount would lead to the increase of recrystallization volume fraction and the decrease of average grain size. Based on the continuous instability criterion and irreversible thermodynamics principle, the hot processing map of 2014 aluminum alloy were established, and the process parameters to obtain recovery microstructure in hot deforming were obtained: the deformation temperature is 380~460 ℃, and the strain rate should be less than 6 s-1. And its feasibility was verified by counterextrusion experiment.

备注/Memo

备注/Memo:
收稿日期：2024-04-25修回日期：2024-07-04 第一作者：罗际韬,男，1999年生，硕士研究生 通讯作者：孙志超，男，1974年生，教授，博士生导师， Email:zcsun@nwpu.edu.cn
更新日期/Last Update: 2025-11-28