Effects of High Quality Al-5Ti-1B Alloy wire on Grain Refinement of Pure Al

Zhang Caijin1; Zheng Kaihong2; Wang Shuncheng2; Qi Wenjun2; Che Xiaozhou1

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Effects of High Quality Al-5Ti-1B Alloy wire on Grain Refinement of Pure Al
Vol. 32, Issue 1, Pages: 77-80(2012)
Published： 2012 ，
DOI：

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[1]张彩锦,郑开宏,王顺成,戚文军,车晓舟.Al-5Ti-1B合金线对纯铝的晶粒细化作用[J].特种铸造及有色合金,2012,32(01):77-80.

Zhang Caijin1, Zheng Kaihong2, Wang Shuncheng2, et al. Effects of High Quality Al-5Ti-1B Alloy wire on Grain Refinement of Pure Al. [J]. Special Casting & Nonferrous Alloys 32(1):77-80(2012)
[1]张彩锦,郑开宏,王顺成,戚文军,车晓舟.Al-5Ti-1B合金线对纯铝的晶粒细化作用[J].特种铸造及有色合金,2012,32(01):77-80. DOI：

Zhang Caijin1, Zheng Kaihong2, Wang Shuncheng2, et al. Effects of High Quality Al-5Ti-1B Alloy wire on Grain Refinement of Pure Al. [J]. Special Casting & Nonferrous Alloys 32(1):77-80(2012) DOI：

摘要

采用电磁搅拌连续铸挤Al-5Ti-1B合金线对纯铝进行细化试验

研究了熔体静置时间、合金线添加量以及添加温度对晶粒细化效果的影响。结果表明

熔体静置时间为5min时

合金线的细化效果较好

静置时间在120min之内

细化效果未出现明显衰退现象;随着合金线添加量的增加

细化后纯铝的晶粒尺寸逐渐减小;细化温度为700～730℃时

Al-5Ti-1B合金线具有较好的细化效果

温度为690℃时

晶粒局部粗大

温度为740℃时

细化后纯铝晶粒尺寸较大。

Abstract

The effects of different holding time

adding temperatures and addition amount of Al-5Ti-1B alloy wire

which was prepared by electromagnetic stirring and castex process

on grain refinement of pure Al were researched.The results show that the refining efficiency of the alloy wire exhibits desirable with the holding time of 5 min.With the holding time less than 120 min

the obvious fading phenomena can not be observed.The grain size of pure Al is decreased with the increase of addition of alloy wire.The grain refining performance of Al-5Ti-1B alloy wire is satisfied with a refining temperature of 700

30 ℃

while with the refining temperature of 690 ℃

local grain size becomes coarsened in the pure Al and the bigger grain size in pure Al occurs when temperature reaches 740 ℃.