中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 12 No. 6 December 2002 |
titanium content produced by electrolysis
WENG Yong-gang（翁永剛）1,SONG Tian-fu（宋天福）1,
XIE Jing-pei （謝敬佩）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
