热暴露对7050铝合金锻件组织和性能的影响  

Effects of Heat Exposure on Microstructure and Properties of 7050 Aluminum Alloy Forgings

作　　者：王猛 张立平 陈志旋 康明 吴军 韩冬 WANG Meng;ZHANG Liping;CHEN Zhixuan;KANG Ming;WU Jun;HAN Dong(Xi'an Aerospace Power Machinery Co.,Ltd.,Xi'an 710025,China)

机构地区：[1]西安航天动力机械有限公司,陕西西安710025

出　　处：《热加工工艺》2025年第3期71-75,81,共6页Hot Working Technology

基　　金：陕西省博士后基金项目(2018BSHGZZHQYXMZZ39)。

摘　　要：采用室温拉伸性能测试、透射电镜(TEM)和电导率测试等方法研究了热暴露温度对7050铝合金模锻件组织与性能的影响。研究结果表明:欠时效状态的合金经热暴露后,强度升高,伸长率降低;随着热暴露温度的升高,合金的强度不断降低,电导率升高。当热暴露温度从154℃增加到160℃时,切向、径向和高向的抗拉强度分别降低为564、546、549 MPa,较热暴露温度为154℃时下降幅度分别达7.1%、7.2%和6.5%。合金的强度随热暴露温度升高而降低的主要原因是η'相和η相的粗化。The effects of heat exposure temperature on the microstructure and properties of 7050 aluminum alloy die forgings were investigated by the measurements of the tensile test,transmission electron microscope(TEM),and electrical conductivity.The results show that the strength of under-aged alloy increases and the elongation decreases after heat exposure.With the increase of heat exposure temperature,the strength of the alloy decreases and the electrical conductivity increases.When the thermal exposure temperature increases from 154℃to 160℃,the tangential,radial and high tensile strength decrease to 564 MPa,546 MPa and 549 MPa,with a decrease of 7.1%,7.2%and 6.5%,respectively.Coarsening ofη'phase andηphase should be responsible for the strength decrease of the 7050 aluminum alloy with the increase of heat epxosure temperature.

关 键 词：7050铝合金 热暴露 析出相 力学性能 

分 类 号：TG166.3[金属学及工艺—热处理]