预拉伸对高纯Al-4.4 Cu-1.5 Mg-0.60 Mn合金型材性能的影响  

Effect of Pre-stretching on Properties of High Purity Al-4.4 Cu-1.5 Mg-0.60 Mn Alloy Profiles

作　　者：孙晓丽 孙亮 Sun Xiaoli;Sun Liang(Liaoning Zhongwang Group Co.,Ltd.,Liaoyang 111003, China)

机构地区：[1]辽宁忠旺集团有限公司,辽宁辽阳111003

出　　处：《有色金属加工》2020年第4期15-17,39,共4页Nonferrous Metals Processing

摘　　要：在Al-4.4 Cu-1.5 Mg-0.60 Mn合金的基础上控制杂质元素Fe、Si的含量得到了高纯度合金,将其挤压成型为型材,并研究了预拉伸永久变形量对其性能的影响。发现在预拉伸永久变形量为0.5%~3%时,高纯2024合金挤压型材的屈服强度随着永久变形量的增加不断提高,而断后延伸率则不断降低,永久变形量的增加对于抗拉强度的影响不大。In this paper,on the basis of Al-4.4 Cu-1.5 Mg-0.60 Mn alloy,the impurity elements Fe and Si are controlled to obtain the high-purity alloy,which is extruded into profiles,and the influence of the prestretched permanent deformation on its properties is studied.It is found that the yield strength of high purity 2024 alloy extruded profiles increases with the increase of the permanent deformation,while the elongation decreases after fracture when the pretension permanent deformation is 0.5%~3%.The increase of the permanent deformation has little effect on the tensile strength.

关 键 词：预拉伸 永久形变量 2024合金 力学性能 

分 类 号：TG379[金属学及工艺—金属压力加工]