摘要
利用光学显微镜、扫描电镜、万能拉伸试验机等设备,研究了中间退火温度对新能源汽车动力电池用4004/3003/4004三层铝合金复合板组织和性能的影响。结果表明,随着退火温度的升高,复合板的包覆率未发生明显变化,复合界面清晰、平直,包覆率偏差较小。皮材4004铝合金层中的Si颗粒细小、弥散,尺寸为2~4μm。中间退火温度为370℃时,芯材3003铝合金层中晶粒全部完成再结晶。随着中间退火温度的升高,复合板抗拉强度和屈服强度先急剧降低后趋于稳定,伸长率呈相反的变化趋势。中间退火温度为370℃时,复合板的强度和伸长率开始趋于稳定,故复合板最佳中间退火温度为370℃,此时复合板的抗拉强度为137 MPa,屈服强度为80 MPa,伸长率为31%。
Effect of intermediate annealing temperature on microstructure and properties of 4004/3003/4004 three-layer aluminum alloy composite sheet for power batteries of new energy vehicles was studied by means of optical microscope, scanning electron microscope and universal tensile testing machine. The results show that with the increase of annealing temperature, the cladding rate does not change obviously and has small deviation, the composite interface of the composite sheet is clear and straight. The Si particles in the 4004 aluminum alloy layer are fine and dispersed, and the size is 2-4 μm. All the grains of the core material 3003 aluminum alloy layer are recrystallized when the intermediate annealing temperature is 370 ℃. The tensile strength and yield strength of the composite sheet decrease sharply at first and then tend to be stable with the increase of intermediate annealing temperature, but the elongation shows an opposite trend. When the intermediate annealing temperature is 370 ℃, the strength and elongation of the composite sheet begin to be stable, thus 370 ℃ is the optimal intermediate annealing temperature of the composite sheet, at which the tensile strength and yield strength are 137 MPa and 80 MPa respectively and the elongation is 31%.
作者
宾月景
刘莹
曹宇
曾勇谋
胡梦晗
莫灼强
王哲英
Bin Yuejing;Liu Ying;Cao Yu;Zeng Yongmou;Hu Menghan;Mo Zhuoqiang;Wang Zheying(School of Mechanical and Resource Engineering,Wuzhou University,Wuzhou Guangxi 543002,China;Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;Guangxi Alnan Aluminum Fabrication Co.,Ltd.,Nanning Guangxi 530031,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2022年第10期203-207,共5页
Heat Treatment of Metals
基金
2022年度广西高校中青年教师科研基础能力提升项目(2022KY0677)
梧州学院2020年校级项目(2020C010)。
关键词
中间退火
新能源汽车
动力电池
铝合金复合板
组织
性能
intermediate annealing
new energy vehicles
power batteries
aluminum alloy composite sheet
microstructure
properties
作者简介
宾月景(1974-),男,高级工程师,博士,主要研究方向为环境工程、材料化学、产业经济,E-mail:binyj@126.com。;通信作者:刘莹,高级工程师,博士研究生,E-mail:l-y0828@qq.com。
