High-speed rail train body Al-zinc-Mg alloy profile aging heat treatment method

• Main Authors: XIE SHANGSHENG, ZHOU WENBIAO, ZHANG XINMING, XIANG JING, TAN SHAN, LE YONGKANG, LI JIAN, ZHAO WEI, HE FENG
• Format: Patent
• Language: English
• Published: 12.08.2015
• Subjects: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a high-speed rail train body Al-zinc-Mg alloy profile aging heat treatment method, and relates to aluminum alloy processing technical field. The method includes low temperature aging, secondary aging and tertiary aging three parts, the aging temperature of the low temperature aging is 20-50 DEG C, the aging time of the low temperature aging is 24-720 hours; the temperature of the secondary aging is 50-150 DEG C, the aging time of the secondary aging is 5 to 40 hours; the tertiary aging temperature is 100-200 DEG C, and the tertiary aging time is 2 to 60 hours. The aging heat treatment method ensures the profile has good strength, high resistance to stress corrosion, high fracture toughness and fatigue resistance performance and other comprehensive performances, and can fully meet the technical requirements of high strength, high toughness, corrosion resistance and high fatigue resistance of a high-speed rail train body Al-zinc-Mg alloy.