Effect of the Cooling Rate of Vacuum Centrifugal Casting on Microstructure and Mechanical Properties of 7055 Aluminum Alloy

被引：2

作者：

Wang Y. ^{[1
,2
]}

Li Y. ^{[1
]}

Qian X.-M. ^{[3
]}

Zhang B.-S. ^{[1
]}

机构：

[1] State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang

[2] Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang

[3] National Cold Rolling Strip Equipment and Process Engineering Technology Research Center, Yanshan University, Qinhuangdao

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2022年 / 43卷 / 12期

关键词：

7055 aluminum alloy; cooling rate; mechanical properties; microstructure; vacuum centrifugal casting;

D O I：

10.12068/j.issn.1005-3026.2022.12.014

中图分类号：

学科分类号：

摘要：

Casting tubes of 7055 aluminum alloy were prepared by the vacuumed centrifugal casting technology. The cooling rate of the casting was changed by the addition of the tundish and the corresponding microstructure and mechanical properties of the alloys were studied. The results show that the microstructure of the casting tube sample with the slow cooling rate(Casting tube 1#) is unevenly distributed. The grains change from the equiaxed grains to the coarse dendritic ones along the solidification direction of the cross-section plane, and some second phases are distributed at the grain boundaries. However, the microstructure of the casting tube sample with the fast cooling rate(Casting tube 2#)consists of the fine equiaxed grains and a small amount of second phases. After homogenization process, the amount of second phases along the solidification direction in both samples increase gradually, and the second phases of Casting tube 1# is greater, while the hardness increment and the tensile properties of Casting tube 2# is higher. © 2022 Northeastern University. All rights reserved.

引用

页码：1769 / 1776

页数：7

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