Combination Effect of Sc/Zr on the Microstructures and Properties of Al-Si Alloys

Wei Zuoshan1; Ding Haimin2; Sun Xiao1; Wang Nana1; Wang Liyan1

doi:10.15980/j.tzzz.2012.12.011

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Combination Effect of Sc/Zr on the Microstructures and Properties of Al-Si Alloys
Vol. 32, Issue 12, Pages: 1171-1174(2012)
Published： 2012 ，
DOI： 10.15980/j.tzzz.2012.12.011

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[1]魏作山,丁海民,孙晓,王娜娜,王丽艳.Sc、Zr联合作用对Al-Si合金组织和性能的影响[J].特种铸造及有色合金,2012,32(12):1171-1174.

Wei Zuoshan1, Ding Haimin2, Sun Xiao1, et al. Combination Effect of Sc/Zr on the Microstructures and Properties of Al-Si Alloys. [J]. Special Casting & Nonferrous Alloys 32(12):1171-1174(2012)
[1]魏作山,丁海民,孙晓,王娜娜,王丽艳.Sc、Zr联合作用对Al-Si合金组织和性能的影响[J].特种铸造及有色合金,2012,32(12):1171-1174. DOI： 10.15980/j.tzzz.2012.12.011.

Wei Zuoshan1, Ding Haimin2, Sun Xiao1, et al. Combination Effect of Sc/Zr on the Microstructures and Properties of Al-Si Alloys. [J]. Special Casting & Nonferrous Alloys 32(12):1171-1174(2012) DOI： 10.15980/j.tzzz.2012.12.011.

摘要

研究了Sc、Zr联合作用对Al-Si合金组织和性能的影响。结果表明

Sc加入到Al-Si合金中后

不仅能够有效地细化共晶团并析出弥散强化相

同时Sc能够参与到高温AlCuNi相的形成过程中

进而影响其形态及分布。因此

Sc的加入能够有效地改善Al-Si合金的硬度及抗拉强度

特别是其高温抗拉强度。Zr与Sc的添加强化了Sc细化共晶团的作用

减少了含Sc粒子析出所需的Sc含量

从而使Sc参与到更多AlCuNi相的形成过程。

Abstract

Combination effects of Sc/Zr on the microstructures and properties of Al-Si alloys were investigated.The results show that the Sc addition can not only refine the eutectic colony and form the Sc containing precipitates in Al-Si alloys

but also take part in the formation of AlCuNi high temperature phase

and then influence its morphology and distribution.As a result

the hardness and strength of AlSi alloys are improved

especially the high temperature strength.Combination addition of Zr and Sc

can enhance the refinement efficiency of Sc on the eutectic colony and reduce the content of Sc in the Sc containing precipitates.Therefore

Sc can take part in the formation of much more AlCuNi phase.