塑性变形工艺对AI-Si-Cu-Mg合金微观组织及力学性能的影响

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文章编号：2096-2983（2025）05-0056-08

引文格式：赵赞溴，，，等．塑性变形工艺对Al-Si-Cu-Mg 合金微观组织及力学性能的影响[J]．有色金属材料与工程， 2025，46（5）： 56-63.DOI： 10.13258/j.cnki.nmme.20250424001.ZHAO Yunhao，PEI Linqing，SUNMing， et al.Effectof plastic deformation processonmicrostructure andmechanical properties ofAl-Si-Cu-Mg allys[J].Nonferrous Metal Materials and Engineering， 2025， 46（5）： 56-63.

关键词：Al-Si-Cu-Mg合金；热挤压；复合塑性变形中图分类号：TG146.2 文献标志码：A

Effect of plastic deformation process on microstructure and mechanical properties of Al-Si-Cu-Mg alloys

ZHAO Yunhao， PEI Linqing， SUN Ming， ZHANG Dongjian， DAI Hangchen， DU Haonan， XU Tanlang （School ofMaterials and Chemistry， University of Shanghai for Science and Technology，Shanghai 20o093; China）

Abstract： In order to develop high-strength aluminum alloys， the effects of single hot extrusion plasticity deformation and "hot extrusion+hot rolling" composite plasticity deformation on the microstructure and mechanical properties of Al -9.8Si–1.85Cu–0.4Mg alloy were comparatively studied. The results show that compared with the single plastic deformation， the alloy prepared by the composite plasticity deformation has higher strength. Its yield strength and ultimate tensile strength reach （209±11.9） ）MPa and （277.1±6.6） MPa respectively，which increase by 45.0MPa and 69.0MPa respectively compared with the single plastic deformation alloy. The strength improvement is mainly attributed to the fact that the composite plastic deformable ally has stronger second-phase strengthening， fine-grained strengthening and work hardening effects. After solution treatment （ 495∘C× and aging treatment （ 175∘C×8h ）， the yield strength and ultimate tensile strength of the composite plasticity deformed alloy were further increased to （ $3 1 1 . 3 { ＼pm } 8 . 7 ＼ ＼$ MPa and （381.1±13.7）MPa ， respectively. The main strengthening mechanism at this stage was precipitation strengthening.

Keywords： Al-Si-Cu-Mg alloy; hot extrusion; composite plasticity deformation

随着全球能源危机以及污染问题的加剧，轻质高强铝合金逐步取代传统钢铁材料[1-2]，被广泛应用在汽车、航空航天等领域中。（剩余9564字）