含稀土Ce 7055铝合金的固溶时效处理  

Solution treatment and aging of 7055 aluminum alloy containing Ce

作　　者：房洪杰 杨喻曾 张智楷 闵红 刘振东 沈雨欣 Fang Hongjie;Yang Yuzeng;Zhang Zhikai;Min Hong;Liu Zhendong;Shen Yuxin(School of Mechanical and Electrical Engineering,Zaozhuang University,Zaozhuang Shandong 277160,China;School of Chemistry and Chemical Engineering,Linyi University,Linyi Shandong 276000,China)

机构地区：[1]枣庄学院机电工程学院,山东枣庄277160 [2]临沂大学化学化工学院,山东临沂276000

出　　处：《金属热处理》2025年第2期155-159,共5页Heat Treatment of Metals

基　　金：国家重点研发计划(2020YFB0311202);枣庄学院博士基金(1020723)。

摘　　要：在实验室制备了含0.1%Ce的7055铝合金薄板,对其进行不同工艺的固溶处理(固溶温度465、470、475和480℃,保温时间20、40和60 min)和时效处理(时效温度120℃,保温时间0~36 h),利用金相显微镜、扫描电镜、透射电镜和电子万能试验机,观察微观组织和测试力学性能。结果表明,合金冷轧板存在470.83℃的低熔点第二相,为避免发生过烧导致板材力学性能下降,固溶温度的选取不可超过该温度。该合金的最佳固溶时效工艺为470℃×60 min+120℃×22 h,该工艺下抗拉强度为577 MPa,屈服强度为547 MPa,伸长率为9.47%。A 7055 aluminum alloy sheet containing 0.1%Ce was prepared in the laboratory,and different solid solution treatments(solution temperature of 465,470,475,and 480℃,holding time of 20,40,and 60 min)and aging treatments(aging temperature of 120℃,holding time of 0-36 h)were carried out,and the microstructure and mechanical properties were observed and tested by using metallographic microscope,scanning electron microscope,transmission electron microscope,and electronic universal testing machine.The results indicate that there is a low melting point second phase at 470.83℃in the cold-rolled alloy sheet.To avoid burning and reduce the mechanical properties of the sheet,the selection of the solid solution temperature should not exceed this temperature.The optimal solid solution and aging process for the alloy is 470℃×60 min+120℃×22 h.Under this process,the tensile strength is 577 MPa,the yield strength is 547 MPa,and the elongation is 9.47%.

关 键 词：7055铝合金 固溶处理 时效处理 力学性能 

分 类 号：TG156.9[金属学及工艺—热处理]