2524铝合金轧制板材热稳定性研究  

Investigation on Thermal-stability of 2524Al Alloy Fabricated by Hot Rolling

作　　者：孙有平[1] 张扬扬[1] 敖哲 韩俊[1] 何江美[1] 

机构地区：[1]广西科技大学机械工程学院,柳州545006 [2]中国石油吉林石化公司检测中心,吉林132021

出　　处：《材料导报（纳米与新材料专辑）》2015年第2期508-510,541,共4页

基　　金：广西高校优秀人才计划项目(桂教人才2012[43]号);广西高校科学技术研究项目(YB2014215)

摘　　要：研究了热暴露温度和时间对T6态2524铝合金轧制板材微观组织及力学性能的影响。结果表明:在热暴露环境下,合金中第二相的粗化、聚集是导致合金硬度下降的主要原因之一;随着温度的升高和时间的延长,合金中析出相的数量明显增多,但温度越高晶粒及析出相粗化越明显。随着热暴露时间的延长,2524铝合金的抗拉强度快速下降,至100h后趋于稳定,而伸长率则先升高,在150h后变化趋于稳定。The influence of temperature and time during thermal exposure on microstructure and mechanical properties of 2524 aluminium alloy for T6 stage were investigated. The results show that the precipitated phase will accumulate and coarsen under the condition of heating, which leads to the decrease of hardness. With the increase of temperature and time, the volume of precipitate phase increase obviously, while the size of grains and precipitated pha ses will also grow with the increase of temperature. With the extension of the experimental period, the tensile strength decreases rapidly with prolonging the holding time until the time achieves 100 hours, and then nearly changes little. The elongation increases at first until the heating time achieves 150 hours, and then also changes little.

关 键 词：2524A1 微观组织 力学性能 热暴露 

分 类 号：TG146.2[一般工业技术—材料科学与工程]