高强韧铝合金非等温时效工艺的研究进展

Research progress in non-isothermal aging process of aluminum alloys with high strength and toughness

非等温时效工艺作为一种新兴的时效处理方法,能够有效地提高高强韧铝合金的综合性能。通过简要归纳近些年来应用于高强韧铝合金的非等温时效工艺,总结出经不同非等温时效处理后高强韧铝合金析出相的特征、合金力学性能和腐蚀性能的变化情况。非等温时效工艺的效率相较于传统时效工艺有很大提高,并且能够同时调控高强韧铝合金内基体析出相和晶界析出相的种类、尺寸和分布情况,使高强韧铝合金兼具与T6峰值时效态相差不多的力学性能和近T7x过时效态的腐蚀性能。最后,对未来高强韧铝合金非等温时效工艺的研究和应用进行了展望。

As a new aging treatment method,the nonisothermal aging process can effectively improve the comprehensive properties of aluminum alloys with high strength and toughness.The cases of nonisothermal aging process applied to aluminum alloys with high strength and toughness in recent years were briefly studied to summarize the characteristics of precipitates and the changes in mechanical properties and corrosion properties of aluminum alloy with high strength and toughness after different nonisothermal aging treatments.It is found that compared with the traditional aging process the efficiency of the nonisothermal aging process has been greatly improved.In addition,moreover,the types,sizes and distributions of matrix precipitates and grain boundary precipitates of aluminum alloy with high strength and toughness can be simultaneously controlled by a nonisothermal aging process so that aluminum alloy with high strength and toughness has mechanical properties similar to the T6 peak aging state and corrosion properties close to the T7x overaging state.Finally,future research and applications of nonisothermal aging processes for aluminum alloys with high strength and toughness are proposed.