Preparation of semi-solid 7075 aluminum alloy slurry by serpentine pouring channel

被引：27

作者：

Zhu, Wen-zhi ^{[1
]}

Mao, Wei-min ^{[1
]}

Tu, Qin ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2014年 / 24卷 / 04期

关键词：

7075 aluminum alloy; semi-solid slurry; serpentine channel; primary alpha(Al); CAST; MICROSTRUCTURE; BEHAVIOR;

D O I：

10.1016/S1003-6326(14)63148-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The semi-solid slurry of 7075 aluminum alloy was prepared by a serpentine pouring channel (SCP). Influences of pouring temperature and the number of turns on the microstructure of semi-solid 7075 alloy slurry were investigated. The results demonstrated that the semi-solid 7075 aluminum alloy slurry with satisfied quality could be generated by a serpentine pouring channel when the pouring temperature was in the range of 680-700 degrees C. At a given pouring temperature, the equivalent size of the primary alpha(Al) grains decreased and the shape factor increased with the increase of the number of turns. During the slurry preparation of semi-solid 7075 aluminum alloy, the flow direction of alloy melt changed many times when it flowed in a curved and closed serpentine channel. With the effect of "stirring" in it, the primary nuclei gradually evolved into spherical and near-spherical grains.

引用

页码：954 / 960

页数：7

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