7 x x x series ultra-high strength aluminum alloys with high specific strength,good toughness and corrosion resistance have important application potential and development prospect in bogie components of rail vehicles to meet the major application requirements of green,safe,efficient and intelligent in the manufacturing of new generation rail vehicles.The development trend of the 7 ××× series ultra-high-strength aluminum alloys is reviewed.In view of the new manufacturing and service requirements of the 7 ×××series ultra-high-strength aluminum alloys for rail vehicles,the performance characteristics and research status of two typical 7 ××× series ultra-high strength aluminum alloys(7050 and 7085 alloy)have been introduced and compared.The problems that need to be studied and solved in the application and service of the 7 ××× series series ultra-high strength aluminum alloy with high efficiency,safety and long life under complex conditions are also prospected.It is expected to provide a guideline for the design,material selection,manufacture and application of bogie components of new generation rail transit vehicles.
7 ××× series ultra-high strength aluminum alloyrail transportationdevelopment trendresearch status
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