This article presents a detailed discussion on typical thermal treatment practices for hardening of various aluminum casting alloys. These practices are solution treatment, quenching or cooling, preaging, and artificial aging at an elevated temperature. The aluminum casting alloys considered here are: Al-Cu and Al-Cu-Mg (2xx) alloys, Al-Zn-Mg (7xx) alloys, Al-Si-Mg alloys, Al-Si-Cu, and Al-Si-Cu-Mg alloys.
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