冷轧变形量对2014铝合金组织和性能的影响  

Effect of Cold Rolling Deformation Amount on Microstructure and Properties of 2014 Aluminum Alloy

作　　者：李俊歧 LI Junqi(Department of Electrical Engineering,Henan Institute of Technology,Xinxiang 453003,China)

机构地区：[1]河南工学院电气工程系,河南新乡453003

出　　处：《热加工工艺》2020年第7期102-104,共3页Hot Working Technology

基　　金：河南省科技攻关项目(072102230007)。

摘　　要：利用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、拉伸试验机研究了不同冷轧变形量对2014铝合金组织与性能的影响。结果表明:经5%~30%不同变形热处理的试样组织基体中有大量白色析出相。5%变形量试样中析出相多为集中的颗粒状、富含Cu、Fe的杂质相。随着变形量的增加,试样中有越来越多的细小均匀的富含Cu的析出相。20%变形量试样位错比30%变形量试样更浓密,分布更均匀。随着变形量的增加,试样强度先增加后降低,伸长率逐渐增加,变形量20%时试样强度达到峰值,抗拉强度达到448 MPa,屈服强度达到351 MPa。变形量30%时,伸长率达到最大值,为17.4%。The effects of cold rolling deformation amount on the microstructure and properties of 2014 aluminum alloy were investigated by means of scanning electron microscopy(SEM),transmission electron microscopy(TEM), X-ray diffraction(XRD) and tensile testing machine. The results show that there are a lot of white precipitated phase in the microstructure matrix of the samples after different deformation(5%-30%) and heat treatment. Most of the precipitated phases in the 5% deformation sample are impurity phase rich in Cu,Fe particles. With the increase of deformation amount, there are more and more fine and uniform Cu-rich precipitates in the samples. The dislocation density of 20% deformation sample is bigger and the distribution is more uniform than that of 30% deformation sample. With the increase of deformation amount,the strength of the sample increases first and then decreases, and the elongation increases gradually. When the deformation amount is 20%, the strength of the sample reaches the peak value, the tensile strength reaches 448 MPa and the yield strength reaches 351 MPa. When the deformation amount is 30%, the elongation reaches the maximum value of 17.4%.

关 键 词：2014铝合金 变形 显微组织 力学性能 

分 类 号：TG339[金属学及工艺—金属压力加工]