Characterization of Al 7075 alloys after cold working and heating in the semi-solid temperature range

被引：75

作者：

Sang-Yong, L ^{[1
]}

Jung-Hwan, L ^{[1
]}

Young-Seon, L ^{[1
]}

机构：

[1] Korea Inst Machinery & Mat, Dept Mat Proc, Changwon 641010, Kyongnam, South Korea

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2001年 / 111卷 / 1-3期

关键词：

7075; Al; cold working methods; SIMA process; thixoforging; hot forging; microstructures; mechanical properties;

D O I：

10.1016/S0924-0136(01)00494-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of cold working and heating conditions on the microstructures of 7075 aluminum alloys were investigated in the SIMA process. Swaging was conducted to control the recrystallization structures in the mushy zone. Different levels of cold working, holding temperatures and holding times were used in this investigation. It was found that at Least 50% cold working was necessary in order to obtain a uniform and fine microstructures during semi-solid heating. The holding time should be between 2 and 3 min in older to prevent gain growth. The optimum heat treatment conditions for the the thixoforged 7075 parts were investigated. The mechanical properties of thixoforged 7075 aluminum alloys were compared with those of conventionally hot forged allays. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：42 / 47

页数：6