CAST AL-SI ALLOY AND PREPARATION METHOD THEREOF

WIPO Patent Application WO/2024/021367

A1

Provided in the present invention are a cast Al-Si alloy and a preparation method thereof. The cast Al-Si alloy comprises the following components in percentage by mass: 6.0-9.0% of Si, 0-0.6% of Mg, 0-1.0% of Cu, 0-0.8% of Zn, 0-1.0% of Mn, 0.1-0.5% of Fe, 0-0.25% of Zr, 0.05%-0.25% of Ti, 0-0.3% of Re, and 0.02-0.2% of Sr, with the balance being Al and inevitable impurities, wherein the total content of impurities in the alloy is ≤ 1.0%, and the content of a single impurity is ≤ 0.15%. In the present invention, the proportion of each alloy element enables the alloy to have high strength and high plasticity. The present invention raises the Mg content of the alloy, and meanwhile, the alloy contains a relatively high content of Cu and Zn, so as to enhance the solid solution strengthening effect of the alloy in cast states, and enhance the aging strengthening effect of the alloy in aging states, thus improving the plasticity of the alloy, and reducing the negative effect thereof on the percentage elongation of the alloy; and meanwhile, other alloy elements are introduced at the same time, further improving the solid solution strengthening effect of the alloy, and effectively improving the strength and plasticity of the alloy.

LIU YULIN (CN)
XU XIAOCHEN (CN)
BI CHANGLAN (CN)
ZHANG BO (CN)
ZHANG LI (CN)
WANG ANGUO (CN)

PCT/CN2022/132117

February 01, 2024

November 16, 2022

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UNIV SHENYANG AEROSPACE (CN)

C22C21/04; C22C1/03; C22C1/06; C22F1/043

CN115261684A	2022-11-01
CN107923004A	2018-04-17
CN113718144A	2021-11-30
CN105441737A	2016-03-30
CN102206778A	2011-10-05
US20030108765A1	2003-06-12

SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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