2013•Ordnance Material Science and EngineeringRequires access

Heat treatment process of new Al-Si-Cu-Mg alloy

Hou Liqu

Abstract

In order to further improve mechanical properties of ZL111 alloy and satisfy operating requirements of higher power engine cylinder heads and cylinder blocks,the heat treatment processes based on chemical composition design of a new Al-Si-Cu-Mg alloy were studied using differential thermal analysis(DTA),microstructure observation,electric resistance and mechanical property measurements. The results show that the optimized heat treatment process of the new Al-Si-Cu-Mg alloy is 490 ℃×4 h+500 ℃×6 h+520 ℃×8 h solution treatment and 165 ℃×9 h aging treatment,the ambient ultimate tensile strength and elongation of the heat treated alloy are 340 MPa and 2.5%,respectively.

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Key concepts: Alloy, Materials science, Microstructure, Ultimate tensile strength, Elongation, Cylinder, Metallurgy, Differential thermal analysis