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The strength of aluminum castings can be improved significantly by heat treatments, which control the size, shape, and distribution of the impurity elements in the casting. This article presents a discussion on the heat treatment of aluminum alloy castings, with a focus on the fundamental technical aspects involved in each process step. The intent is to convey a good understanding of the fundamental aspects of heat treatment. Typical heat treatments of aluminum casting alloys are presented in a table. The article describes the solution heat treatment, quenching, and preaging of Al-Si-Mg alloys, as well as the solution heat treatment and artificial aging of Al-Si-Cu-Mg casting alloys.

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Geoffrey K. Sigworth, Heat Treatment of Aluminum Alloy Castings, Aluminum Science and Technology, Vol 2A, ASM Handbook, Edited By Kevin Anderson, FASM, John Weritz, J. Gilbert Kaufman, FASM, ASM International, 2018, p 478–492,

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