Effects of conform continuous extrusion and heat treatment on the microstructure and mechanical properties of Al-13Si-7.5Cu-1Mg alloy

Gao-yong Lin; Xin Tan; Di Feng; Jing-li Wang; Yu-xia Lei

doi:10.1007/s12613-019-1815-8

Volume 26 Issue 8

Aug. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(8): 1013-1019

Gao-yong Lin, Xin Tan, Di Feng, Jing-li Wang, and Yu-xia Lei, Effects of conform continuous extrusion and heat treatment on the microstructure and mechanical properties of Al-13Si-7.5Cu-1Mg alloy, Int. J. Miner. Metall. Mater., 26(2019), No. 8, pp. 1013-1019. https://doi.org/10.1007/s12613-019-1815-8

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Gao-yong Lin, Xin Tan, Di Feng, Jing-li Wang, and Yu-xia Lei, Effects of conform continuous extrusion and heat treatment on the microstructure and mechanical properties of Al-13Si-7.5Cu-1Mg alloy, Int. J. Miner. Metall. Mater., 26(2019), No. 8, pp. 1013-1019. https://doi.org/10.1007/s12613-019-1815-8

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Research Article

Effects of conform continuous extrusion and heat treatment on the microstructure and mechanical properties of Al-13Si-7.5Cu-1Mg alloy

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Corresponding author:
Gao-yong Lin E-mail: mater218@163.com
Received: 17 September 2018; Revised: 16 November 2018; Accepted: 20 November 2018

Abstract

Abstract

The effects of conform continuous extrusion and subsequent heat treatment on the mechanical and wear-resistance properties of high-alloying Al-13Si-7.5Cu-1Mg alloy were investigated. The microstructures of alloys before and after conform processing and aging were compared by transmission electron microscopy and scanning electron microscopy, respectively. The results reveal that the primary phases were broken and refined by intense shear deformation during conform processing. After the conform-prepared Al-13Si-7.5Cu-1Mg alloy was subjected to solid-solution treatment at 494℃ for 1.5 h and aging at 180℃ for 4 h, its hardness improved from HBS 115.8 to HBS 152.5 and its ultimate tensile strength increased from 112.6 to 486.8 MPa. Its wear resistance was also enhanced. The factors leading to the enhanced strength, hardness, and wear resistance of the alloy were discussed in detail.
- Al-13Si-7.5Cu-1Mg alloy;
- conform continuous extrusion;
- heat treatment;
- wear resistance

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