Cu、Mg、Si元素含量对2014铝合金组织与性能的影响  

Influence of Cu,Mg and Si elements on microstructures and mechanical properties of 2014 aluminum alloy

作　　者：林茂 曹海龙 田宇兴 吴浩 Lin Mao;Cao Hailong;Tian Yuxing;Wu Hao(Northwest Aluminum Co.,Ltd.,Dingxi 401326,China;Chinalco Materials Application Research Institute Co.,Ltd.,Beijing 102218,China)

机构地区：[1]西北铝业有限责任公司,定西748111 [2]中铝材料应用研究院有限公司,北京102209

出　　处：《铝加工》2023年第4期14-17,58,共5页Aluminium Fabrication

摘　　要：通过设计三种合金成分,研究了Cu、Mg、Si元素含量对2014铝合金组织与性能的影响。研究结果表明,随着Cu、Mg、Si含量的增大,铸态组织的共晶相增多;当Cu含量低于4.2%时,502℃×30 h均匀化退火可以使Al_(2)Cu完全回溶。合金经热挤压、固溶及人工时效处理后,合金保留了挤压变形的取向组织,但伴随有少量地细小再结晶晶粒形成。力学性能表明,Cu、Mg、Si含量的增加提高了合金强度并且没有降低断后延伸率。三种合金时效态屈服强度达到460 MPa以上,抗拉强度达到517 MPa以上,延伸率不低于10%,综合性能超出国际AMS标准。The influence of Cu,Mg and Si elements on microstructure and mechanical properties of 2014 alloy was studied.The re⁃sults show that the content of eutectic phase increases with the content of Cu,Mg and Si.As the Cu below 4.2%,the Al_(2)Cu can be dis⁃solved after homogenization at 502℃for 30h.Suffered hot extrusion,solid solution and aging,the alloy retained the deformation mi⁃crostructures with fiber orientation<111>,while accompanied little recrystalization grains.Mechanical properties exhibits that strength can be increased by the increased content of Cu,Mg and Si,while no decrease in elongation.The yield and ultimate strength of three alloys attain up to 460MPa and 517MPa,respectively,with elongation of above 10%,and the combination property exceed the international standard AMS.

关 键 词：2014铝合金 微观组织 力学性能 固溶 时效 

分 类 号：TG146.21[一般工业技术—材料科学与工程]