T6处理对热轧态Al-xCu-0.5Mg-0.7Si合金组织性能影响  

Effects of T6 Treatment on Microstructure and Properties of Hot-rolled Al-xCu-0.5Mg-0.7Si Alloy

作　　者：戴翌龙 周林 郑革 刘鑫 曹少华 Dai Yilong;Zhou Lin;Zheng Ge;Liu Xin;Cao Shaohua(Yonggu Group Co.,Ltd.;School of Materials Science and Engineering,Xiangtan University)

机构地区：[1]永固集团股份有限公司 [2]湘潭大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2023年第3期415-419,共5页Special Casting & Nonferrous Alloys

基　　金：湖南省科技创新计划资助项目(2020RC2080)。

摘　　要：以Al-xCu-0.5Mg-0.7Si铝合金(x=2.5、1.5、0.5)为研究对象,并对每种成分的铝合金分别进行两种处理:只进行热轧制和在热轧制后进行T6热处理,旨在探究Cu含量及T6处理对轧制态Al-xCu-0.5Mg-0.7Si铝合金组织和性能的影响。结果表明,添加Cu元素,会促使铝合金析出Al_(2)Cu相,提高铝合金的抗拉强度和硬度,但耐腐蚀性会随Cu含量的增加而降低。经T6处理后,铝合金轧制后的流线组织消失,形成新的无畸变的细等轴晶,同时会析出大量的弥散分布的Al_(2)Cu相,使得铝合金的抗拉强度、塑性、硬度和耐腐蚀性都得到明显提高。Two kinds of treatment(hot rolling and T6 heat treatment after hot rolling)were carried out on Al-xCu-0.5Mg-0.7Si aluminum alloys(x=2.5,1.5,0.5)alloy with different compositions.Effects of Cu content and T6 heat treatment on microstructure and properties of as-rolled Al-xCu-0.5Mg-0.7Si aluminum alloy were investigated.The results indicate that Cu addition promotes the precipitate of Al_(2)Cu phase in the alloy,thus enhancing tensile strength and hardness,while corrosion resistance is decreased with the increase of Cu content.After T6 heat treatment,the rolled streamline microstructure in the aluminum alloy disappears,forming a new fine equiaxed crystals without distortion,and a large amount of dispersed Al,Cu phase are precipitated,significantly improving the tensile strength,plasticity,hardness and corrosion resistance of aluminum alloy.

关 键 词：Al-Cu-Mg-Si铝合金 热轧 T6热处理 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG166.3[金属学及工艺—金属材料]