均匀化时间对2024铝合金组织及性能的影响  

Effect of Homogenization Times on Microstructure and Properties of 2024 Aluminum Alloy

作　　者：冯艳飞 王东辉 杨路 谢方亮 郑建 王克 FENG Yan-fei;WANG Dong-hui;YANG Lu;XIE Fang-liang;ZHENG Jian;WANG Ke(Yingkou Zhongwang Aluminum Business Co.,Ltd.,Yingkou Liaoning 115000,China)

机构地区：[1]营口忠旺铝业有限公司,辽宁营口115000

出　　处：《热处理技术与装备》2021年第4期29-33,共5页Heat Treatment Technology and Equipment

基　　金：辽宁省科技重大专项资助(2019JH1/10100012)。

摘　　要：通过显微组织观察、电导率及力学性能测试,研究了不同均匀化时间对2024铝合金组织与性能的影响。结果表明:合金铸锭中存在大量非平衡共晶相,晶粒分布不均匀,出现较多的发达枝晶。经495℃×28 h均匀化处理后,非平衡共晶组织基本消失,枝晶偏析消除,弥散相较细小且分布均匀,电导率、维氏硬度和抗拉强度分别为36.66%IACS、143.5HV和367.5 MPa,较铸态分别提高了22.4%、48.2%和35.6%。The effects of different homogenization times on microstructure and mechanical properties of 2024 aluminum alloy are investigated by microstructure observation,electrical conductivity and mechanical properties testing.The results show that there are a large amount of non-equilibrium eutectic phases in the alloy ingot,the grain distribution is unhomgeneous,and there are more developed dendrites.After homogenization at 495℃ for 28 h,the non-equilibrium eutectic structure basically disappears,the dendrite segregation is eliminated,the dispersed phase is small and homogeneous distribution.The conductivity,Vickers hardness and tensile strength are 36.66%IACS,143.5 HV and 367.5 MPa,which can increase by 22.4%,48.2%and 35.6%compared with the as-cast alloys,respectively.

关 键 词：2024合金 均匀化时间 组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]