Al-Si-P master alloy and its modification and refinement performance on Al-Si alloys

被引：18
|
作者：
Zuo Min [1 ]
Liu Xiangfa [1 ]
Dai Hongshang [1 ]
Liu Xiangjun [2 ]
机构：
[1] Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China
[2] Shandong Shanda & Mg Melt Technol Co Ltd, Jinan 250061, Peoples R China
来源：
RARE METALS | 2009年 / 28卷 / 04期
关键词：
Al-Si alloys; Al-Si-P master alloy; primary Si; P recovery; modification; refinement; HETEROGENEOUS NUCLEATION; MECHANICAL-PROPERTIES; MICROSTRUCTURE; ALUMINUM; SOLIDIFICATION;
D O I：
10.1007/s12598-009-0080-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An Al-Si-P master alloy has been developed by an in-situ reaction and the electron probe microanalyzer (EPMA) results show that there are many pre-formed AlP particles contained in the master alloy. Silicon introduced into the system plays an important role in remarkably improving the distribution and content of AlP particles due to their similar crystal structure and lattice parameters. ZL109 alloys have shown fast modification response to the addition of 0.5% Al-15Si-3.5P master alloy at 720A degrees C, with a mass of primary Si precipitating in size of about 15 mu m. Also, coarse primary Si grains in Al-30Si alloy can be refined dramatically from 150 mu m to 37 mu m after the addition of 2.0% Al-15Si-3.5P master alloy at 850A degrees C. The P recovery of the Al-15Si-3.5P master alloy is much higher than that of a Cu-8.5P master alloy due to the pre-formed AlP particles.
引用
收藏
页码：412 / 417
页数：6
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