缓慢升温时效处理对Al-Zn-Mg-Er-Zr合金性能的影响  

Effect of low heating rate aging treatment on properties of Al-Zn-Mg-Er-Zr alloy

作　　者：仇晨 荣莉 魏午 王为 文胜平 黄晖[1] 董阳 王玉刚 Qiu Chen;Rong Li;Wei Wu;Wang Wei;Wen Shengping;Huang Hui;Dong Yang;Wang Yugang(Key Laboratory of Advanced Functional Materials,Education Ministry of China,Beijing University of Technology,Beijing 100124,China;Shandong Yankuang Light Alloy Co.,Ltd.,Zoucheng Shandong 273515,China)

机构地区：[1]北京工业大学新型功能材料教育部重点实验室,北京100124 [2]山东兖矿轻合金有限公司,山东邹城273515

出　　处：《金属热处理》2023年第3期8-11,共4页Heat Treatment of Metals

基　　金：国家重点研发计划(2021YFB3700901)。

摘　　要：利用扫描电镜(SEM)、显微硬度计及电导仪研究了120℃时效的两种不同工艺对Al-5Zn-3Mg-0.1Er-0.1Zr合金力学性能及导电率的影响。结果表明,相较于直接置于120℃时效工艺,采用5 h缓慢升温至120℃时效处理的试验合金的导电率提高至30.77%IACS,硬度、抗拉强度、屈服强度和伸长率分别提升至186.6 HV0.2、538 MPa、454 MPa和17.5%。两种时效工艺处理合金的断裂方式均为韧脆混合型断裂,但5 h缓慢升温时效处理合金的韧窝密度较高,剪切面特征减少。Effect of two different aging processes at 120℃on mechanical properties and electrical conductivity of Al-5Zn-3Mg-0.1Er-0.1Zr alloy was studied by scanning electron microscope(SEM),microhardness tester and conductometer.The results show that compared with the aging process by directly putting specimens at 120℃,the conductivity of the tested alloy after 5 h slow heating to 120℃aging process is increased to 30.77%IACS,and the hardness,tensile strength,yield strength and elongation are increased to 186.6 HV0.2,538 MPa,454 MPa and 17.5%,respectively.Both the fracture modes are ductile-brittle mixed fracture for the alloy treated by the two different aging processes,but for the alloy treated by 5 h slow heating to 120℃aging,the dimple density is higher,and the shear plane characteristic is reduced.

关 键 词：AL-ZN-MG合金 时效处理 导电率 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]