Effect of extrusion temperature and rate on formability and microstructure of 7075 aluminum alloy

被引：0
|
作者：
Wu, X. K. [1 ,2 ]
Zhang, X. M. [1 ]
Yuan, G. C. [3 ]
机构：
[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
[2] Guangdong Xingfa Grp, Foshan 528061, Peoples R China
[3] Guangzhou Univ Technol, Sch Mat Sci & Engn, Guangzhou 510090, Peoples R China
来源：
2006 BIMW: 2006 BEIJING INTERNATIONAL MATERIALS WEEK, PTS 1-4: MAGNESIUM | 2007年 / 546-549卷
关键词：
7075 aluminum alloy; extrusion; microstructure;
D O I：
10.4028/www.scientific.net/MSF.546-549.971
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of forward extrusion temperature and rate on the formability and microstructure of 7075 aluminum alloy was investigated by means of scanning electron microscopy (SEM), optical microscopy (OM) and hardometer. The results showed that the outflow rate was in the range of 6 similar to 2m/min with the extrusion temperature from 340 degrees C to 420 degrees C. Higher temperature resulted in lower critical extrusion force, decreased permissible extrusion rate and obvious drop in the formability. Lower temperature resulted in improvement in the formability but higher critical extrusion force, which might lead to shuttingdown of the extruder. There were no obvious effects of extrusion temperature and rate on the microstructure and hardness of the as-extruded alloy. It suggests that dynamic recovery or partial recrystallization occurred in the alloy during extrusion.
引用
收藏
页码：971 / +
页数：2
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