您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 6    December 2002

[PDF Download]    [Flash Online]

    

Grain refinement effects of Al based alloys with low
titanium content produced by electrolysis
LIU Zhi-yong(刘志勇)1, WANG Ming-xing(王明星)1,
WENG Yong-gang(翁永刚)1,SONG Tian-fu(宋天福)1,
XIE Jing-pei (谢敬佩)2, HUO Yu-p

1. Key Laboratory of Materials Physics,
Zhengzhou University, Zhengzhou 450052, China;
2. Department of Materials Science and Engineering,
Luoyang Institute of Technology,Luoyang 471039, China

Abstract:A series of Al based alloys with low titanium contents (mass fraction) from 0.178% to 0.526% were directly produced in ordinary industrial electrolyzer. The electrolyzing results show that producing Al based alloys with titanium contents of less than 0.30% without great loss of electrolysis efficiency is possible. The quantitative analysis shows that this method has a great refining effect on transiting the coarse columnar grains in pure Al to equiaxed grains. The grain sizes decrease with the increase of titanium content and tend to a low limit at about 130μm. During the solidification, the non-equilibrium distribution of titanium leads to a great growth-restricting effect and a constitutional under-cooling zone in front of the growing liquid/solid interface. 

 

Key words:   aluminum alloy; low titanium content; electrolysis; grain refinement

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn