EPT+DC协同调控7N01铝合金微观组织和性能

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中图分类号：TG156.7 文献标识码：A DOI：10.7535/hbkd.2025yx06007

Abstract：Inorder toimprove thecorrosion resistance and mechanical propertiesof7Nol Al alloy，themicrostructure， corosionresistance and mechanical propertiesof 7Nol Al ally in processing stage were studiedbythecombinationof electropulse solution treatment（EPT）and DC two-stage aging treatment.Theresultsindicate that afterEPT，the selfcorrosion current density of the 7No1 Al alloy sample decreases by 82.4% ，thereby enhancing its corrosion resistance，and althoughtheplasticityisfavorable，thereisareductioninstrength；Aftersubsequent DC，corrosionresistanceimproves by

69.4% compared to the untreated sample，and while thereis a slight grain growth，the strengthening phase is re-precipitated， giving a tensile strength higher than that after EPT alone. The EPT + DC process effectively enhances the microstructure and propertiesof the7Nolaluminumally，whichprovides theoreticalsupportand technicalreferencefortheelectricaltreatmentof metallic materials.

Keywords：metalic material;7Nol Al alloy；electropulse solution treatment（EPT）；DC two-stage aging treatment（DC）; corrosion resistance

7N01铝合金属于 Al-Zn-Mg 系列铝合金，可以通过热处理改善其组织及性能，具有比强度高、可加工性好、低温力学性能好等优点，主要用于航空航天、高速列车等领域[1-3]。（剩余11288字）