摘要
采用导电率测试、力学性能测试、硬度测试以及SEM分析等手段,研究了经0~2%拉伸变形和170~190℃人工时效后固溶态6101铝合金板电导率、强度、不平度以及微观组织的变化。结果表明,固溶淬火后对合金板施加不小于1%拉伸量可获得良好的板形,板材不平度波高不大于3 mm。在时效进程中,对合金板施加1%拉伸量有助于促进时效过程中析出相析出,使合金具有较高水平导电率,与未拉伸变形时的导电率相近。研究还发现,合金经1%拉伸变形及180℃中等时效温度下,即使时效时间从6 h延长时效至18 h,导电率也不小于56%IACS,抗拉强度仍达到215 MPa以上,硬度达到HV70/5以上;微观组织显示合金晶粒保留了固溶态的再结晶等轴晶粒形貌,平均晶粒尺寸约75μm;合金拉伸断口呈现出与固溶态一致的韧窝形貌,断裂类型为韧性断裂,表现出优异的力学性能。最适宜大生产的工艺制度为1%拉伸变形+180℃(6~18)h人工时效。
The effects of artificial aging at 170-190℃after 0-2%tensile deformation on the electrical conductivity,strength,flatness,and microstructure of solution-treated 6101 aluminum alloy sheet were investigated using electrical conductivity testing,mechanical property testing,hardness testing,and SEM analysis.The results show that applying a tensile deformation of not less than 1%to the alloy after solution quenching can achieve a good sheet shape,with the wave height of flatness meeting the requirement of≤3 mm.During the aging process,applying 1%tensile deformation to the alloy helps promote the precipitation of precipitated phases,resulting in a higher level of electrical conductivity,which is closer to that of the alloy without tensile deformation.The study also finds that after 1%tensile deformation and aging at a moderate temperature of 180℃,even if the aging time is extended from 6 h to 18 h,the electrical conductivity remains not less than 56%IACS,the tensile strength still reaches above 215 MPa,and the hardness reaches above HV70/5.Microstructural observation shows that the alloy grains retain the recrystallized equiaxed grain morphology of the solution-treated state,with an average grain size of approximately 75μm.The tensile fracture of the alloy exhibits a dimple morphology consistent with that of the solution-treated state,and the fracture type is ductile fracture,indicating excellent mechanical properties.The moderate aging temperature of 180℃is more suitable for engineering production needs,and the most appropriate large-scale production process system is 1%tensile deformation+artificial aging at 180℃for 6-18 h.
作者
韦祖祥
杨振兴
刘莹莹
黄程毅
徐燕萍
谢飞
林清泉
闫焱
WEI Zuxiang;YANG Zhenxing;LIU Yingying;HUANG Chengyi;XU Yanping;XIE Fei;LIN Qingquan;YAN Yan(ALG Aluminium lnc.,Nanning 530031,China;Guangxi Key Laboratory of Materials and Processes of Aluminum Alloys,Nanning 530031,China)
出处
《轻合金加工技术》
2025年第7期41-46,51,共7页
Light Alloy Fabrication Technology
基金
2024年自治区国资委监管企业科技创新资金项目
2024年南宁市江南区科技重大专项(20240826-01)。
关键词
6101铝合金板
拉伸变形
人工时效
导电率
力学性能
6101 aluminum alloy sheet
tensile deformation
artificial aging
conductivity
mechanical properties
