Study on High Temperature Tensile Properties of Al-Si-Mg-Cu Cast Aluminum Alloy

Author of the article:HONG Runzhou, FAN Xueyi, ZUO Qiang, ZHANG Zhe

Author's Workplace：Engineering Research Center of Cast Aluminium and Magnesium Alloys, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China

Key Words：cast aluminum alloy; high temperature tensile property; stabilization treatment; heat resistant property

Abstract：The instantaneous tensile properties of an Al-Si-Mg-Cu cast aluminum alloy at 200 ℃ and 250 ℃ respectively were studied.And the instantaneous tensile properties at high temperature after being stabilized at 200 ℃ and 250 ℃ for different time, and the high temperature tensile properties of Al-Si series heat-resistant cast aluminum alloy commonly used in existing standards were compared.The results show that the instantaneous tensile properties of Al-Si-Mg-Cu cast aluminum alloy decrease with the increase of test temperature. With the increase of stabilization temperature and time, the strength decreases, and the elongation remains unchanged at 200 ℃, but increases significantly at 250 ℃. At 200 ℃, Al-Si-Mg-Cu cast aluminum alloy shows good tensile properties, which is obviously better than other commonly used Al-Si heat resistant cast aluminum alloys.