Solidification Structure and Modification Effect of Al-30Cu-3P Master Alloy on Al-20Si Alloy

Ren Wei; Huang Yuduo; Chen Shuying; Li Qingchun; Chang Guowei

doi:10.15980/j.tzzz.2019.05.027

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Solidification Structure and Modification Effect of Al-30Cu-3P Master Alloy on Al-20Si Alloy
Vol. 39, Issue 5, Pages: 560-563(2019)
Published： 2019 ，
DOI： 10.15980/j.tzzz.2019.05.027

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[1]任为,黄玉多,陈淑英,李青春,常国威.Al-30Cu-3P中间合金组织及其对Al-20Si合金的变质效果[J].特种铸造及有色合金,2019,39(05):560-563.

Ren Wei, Huang Yuduo, Chen Shuying, et al. Solidification Structure and Modification Effect of Al-30Cu-3P Master Alloy on Al-20Si Alloy. [J]. Special Casting & Nonferrous Alloys 39(5):560-563(2019)
[1]任为,黄玉多,陈淑英,李青春,常国威.Al-30Cu-3P中间合金组织及其对Al-20Si合金的变质效果[J].特种铸造及有色合金,2019,39(05):560-563. DOI： 10.15980/j.tzzz.2019.05.027.

Ren Wei, Huang Yuduo, Chen Shuying, et al. Solidification Structure and Modification Effect of Al-30Cu-3P Master Alloy on Al-20Si Alloy. [J]. Special Casting & Nonferrous Alloys 39(5):560-563(2019) DOI： 10.15980/j.tzzz.2019.05.027.

摘要

采用熔体混合法制备Al-30Cu-3P中间合金

研究了熔体混合情况下制备的Al-30Cu-3P中间合金凝固组织的演变及其对Al-20Si合金的变质效果。结果表明

Al-30Cu-3P中间合金组织由初生α-Al+（α-Al+CuAl2）共晶+AlP组成。随着熔体搅拌时间延长

Al-30Cu-3P合金的组织中

初生α-Al相数量逐渐减少

AlP数量逐渐增多

尺寸逐渐增大。熔体搅拌时间为20 min时制备的Al-30Cu-3P中间合金中形成的AlP尺寸最小

将其加入到Al-20Si合金中进行变质

初生Si的尺寸由61.36μm细化到20.24μm。

Abstract

Al-30Cu-3P master alloy was prepared by melt mixing method.The evolution of the solidification microstructure in Al-30Cu-3P master alloy and its modification effect on Al-20 Si alloy were expounded.The results indicate that the solidification microstructures in Al-30Cu-3P master alloy is composed of primaryα-Al phase

eutectic（α-Al+CuAl

）and AlP.With increasing in stirring time

the number of primaryα-Al phases in the Al-30Cu-3P master alloy is reduced gradually

while the quantity of AlP is increased gradually with coarseness of size.The AlP presents the smallest size in the Al-30Cu-3P master alloy prepared by the melt stirring time for 20 min.The size of the primary silicon in Al-20 Si alloy is refined from 61.36μm to 20.24μm with the Al-30Cu-3P master alloy modification.