Aging method for improving strength of rolled 7xxx series aluminum alloy

• Main Authors: ZHANG YELIN, YANG HONGFU, LI MENGNIE, HUANG RENSONG, ZHENG SHANJU, SUN PENG
• Format: Patent
• Language: Chinese; English
• Published: 29.09.2023
• 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 relates to an aging method for improving the strength of a rolled 7xxx series aluminum alloy, and belongs to the technical field of aluminum alloy aging heat treatment. The 7xxx series aluminum alloy is heated to the temperature of 480-500 DEG C at a constant speed, heat preservation is conducted for 90-100 min, solution treatment is conducted, and then water-cooling quenching is conducted to the room temperature; pre-aging treatment is conducted, specifically, the quenched 7xxx series aluminum alloy is heated to 120-150 DEG C at a constant speed, and heat preservation is conducted for 24-30 h; high-temperature regression aging treatment is conducted, specifically, the 7xxx series aluminum alloy subjected to pre-aging treatment is heated to 180-200 DEG C from 120-150 DEG C at the heating rate of 30-60 DEG C/h, and air cooling is conducted to the room temperature after non-isothermal regression treatment is conducted; or heating from the temperature of 120-150 DEG C to the temperature of 195-200