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本文研究了预拉伸变形度（ε：０ ～５ ％ ） 对高纯硬铝２２２４ —Ｔ３５１０ 挤压型材组织性能的影响。结果证明，型材淬火后进行预拉伸变形不仅能消除淬火残余应力，而且对显微组织和力学性能也有一定影响。当ε＝ １ ％ ～３ ％ 时，国产型材时效后的力学性能完全能达到美国波音公司材料标准ＢＭＳ７ —２２５Ｃ 的规定值，但未预拉伸的型材，σ０ ．２ 则略低于标准值，而ε＞ ３ ％ 或达到５ ％ 的型材，延伸率δ（１０ ．８ ％ ） 则降到１２％ 以下，达不到标准规定值。预拉伸变形过程中形成的位错，有利于非共格析出相Ｓ’或θ’的析出，因而有提高型材时效硬化效果的作用。
In this paper, the effect of pretension deformation (ε: 0 ~ 5%) on the microstructure and properties of high-purity ductile aluminum 2224-T3510 extruded profiles was studied. The results show that pre-tensile deformation after quenching can not only eliminate quenching residual stress, but also to the microstructure and mechanical properties have a certain impact. When ε = 1% ~ 3%, the mechanical properties of domestic profiles after aging can meet the requirements of the United States Boeing material standard BMS7 -225C, but not pre-stretched profiles, σ0. 2 slightly lower than the standard value, and ε> 3% or up to 5% of the profile, the elongation δ (10 .8%) fell below 12%, below the standard value. The dislocations formed during the prestretch deformation are conducive to the precipitation of the non-coherent precipitates S ’or θ’ and therefore have the effect of increasing the age hardening effect of the profile.