稀土元素La对Al-0.5Mg-0.24Si合金组织和性能的影响

赵燕; 张宇博; 李廷举; 王玮; 李绍威; 许晨玲

doi:10.15980/j.tzzz.2021.10.007

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稀土元素La对Al-0.5Mg-0.24Si合金组织和性能的影响
Effects of Rare Earth Element La on the Microstructure and Properties of Al-Mg-Si Alloy
2021年41卷第10期页码：1219-1223
纸质出版日期： 2021 ，
DOI： 10.15980/j.tzzz.2021.10.007

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赵燕, 张宇博, 李廷举, 等. 稀土元素La对Al-0.5Mg-0.24Si合金组织和性能的影响[J]. 特种铸造及有色合金杂志, 2021,41(10):1219-1223.

Effects of Rare Earth Element La on the Microstructure and Properties of Al-Mg-Si Alloy[J]. Special Casting & Nonferrous Alloys, 2021,41(10):1219-1223.
赵燕, 张宇博, 李廷举, 等. 稀土元素La对Al-0.5Mg-0.24Si合金组织和性能的影响[J]. 特种铸造及有色合金杂志, 2021,41(10):1219-1223. DOI： 10.15980/j.tzzz.2021.10.007.

Effects of Rare Earth Element La on the Microstructure and Properties of Al-Mg-Si Alloy[J]. Special Casting & Nonferrous Alloys, 2021,41(10):1219-1223. DOI： 10.15980/j.tzzz.2021.10.007.

摘要

以Al-0.5Mg-0.24Si合金为研究对象

探讨了稀土元素La对合金微观组织、导电性能、力学性能及耐腐蚀性的影响。结果表明

La能与Si形成LaSi

稀土相

并且促进富Fe相从β-Al

FeSi向α-Al

Si转变。经过热轧和热处理后

适量La的加入可提高Al-0.5Mg-0.24Si合金的电导率和力学性能。当La的加入量为0.1%时

合金电导率最高

为31.80 MS/m;当La的加入量为0.3%

合金抗拉强度为175 MPa

伸长率为22%。但La的加入会降低铝合金的耐腐蚀性能。

Abstract

Taking Al-0.5 Mg-0.24 Si alloy as object

the effects of rare earth element La on the microstructure

electrical conductivity

mechanical properties and corrosion resistance of Al-0.5 Mg-0.24 Si alloy were investigated. The results indicate that the combination of La with Si can generate rare earth phase LaSi

which promotes the transformation from the β-Al

FeSi phase to α-Al

Si phase. After hot rolling and heat treatment

the appropriate addition of La can enhance the electrical conductivity and tensile properties of Al-0.5 Mg-0.24 Si alloy. With the addition of 0.1% La

the electrical conductivity reaches the maximum value of 31.80 MS/m. With the addition of 0.3% La

the tensile strength and the elongation reach 175 MPa and 22%

respectively

whereas the addition of La can reduce the corrosion resistance of Al alloy.