铸造技术2025，Vol.46Issue(7)：645-654,10.DOI:10.16410/j.issn1000-8365.2025.5041
铸态2A14铝合金斜轧穿孔实验研究
Experimental Study on Rotary Tube Piercing of As-cast 2A14 Aluminium Alloy
摘要
Abstract
As a representative type of 2xxx series aluminium alloy,2A14 aluminium alloy has been widely used in aircraft wheel hubs and aerospace equipment connectors.To achieve higher strength and toughness in 2A14 aluminium alloy components,the focus should be on the as-cast 2A14 aluminium alloy subjected to rotary tube piercing deformation within a temperature range of 360～450 ℃ and a rolling ratio of 1.10～1.96.The microstructure and mechanical properties of the alloy were investigated through comparative analysis after solution treatment(502 ℃/2 h)and aging treatment(165 ℃/10 h).The results indicate that after rotary tube piercing deformation,the original as-cast structure gradually disintegrates with increasing deformation temperature and rolling ratio,accompanied by an increase in recrystallized grains and serrated grain boundaries.The density of low-angle grain boundaries within the grains increases,the proportion of recrystallization increases,and the content of substructures and deformed grains decreases.The alloy exhibits optimal comprehensive mechanical properties at a deformation temperature of 450 ℃ and a rolling ratio of 1.96,with nearly eliminated anisotropy and a strength?ductility product of 5824 MPa·％.Fracture morphology analysis reveals that the fracture mode transitions from brittle to ductile as the rolling ratio increases.关键词
2A14铝合金/斜轧穿孔成形/力学性能/显微组织Key words
2A14 aluminium alloy/rotary tube piercing/mechanical properties/microstructure分类
矿业与冶金引用本文复制引用
刘逸凡,杨艳慧,刘宜佳,赵朗,梁正霏..铸态2A14铝合金斜轧穿孔实验研究[J].铸造技术,2025,46(7):645-654,10.基金项目
重庆市技术创新与应用发展专项重点项目(14003-5110210023) （14003-5110210023）
