7×××系超高强铝合金在我国轨道交通车辆的研究应用现状与展望

Research application status and prospect of 7×××series ultra-high strength aluminum alloy in rail transit vehicles in China

针对新一代轨道交通车辆制造提出的“绿色、安全、高效、智能”的重大应用需求,高比强度、良好韧性和耐蚀性的7×××系超高强铝合金在轨道交通车辆转向架部件具有重要的应用潜力和发展前景。本文回顾了7×××系超高强铝合金在国内轨道交通车辆的研究与应用现状。针对轨道交通车辆领域对7×××系超高强铝合金制造与服役的新需求,重点回顾和对比了两种典型7×××系超高强铝合金(7050和7085合金)的性能特点和研究现状,并展望了7×××系超高强铝合金在复杂条件下高效、安全和长寿命应用与服役亟需研究与解决的关键问题,期望为新一代轨道交通车辆转向架部件的设计、选材、制造、应用提供参考。

7×××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.