退火温度对纯铜箔微拉深成形质量的影响  

Effect of annealing temperature on forming quality of pure copper foils for micro deep drawing

作　　者：张可欣 马晓光 赵敬伟 ZHANG Ke-xin;MA Xiao-guang;ZHAO Jing-wei(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Engineering Research Center of Advanced Mental Composites Forming Technology and Equipment,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]太原理工大学先进金属复合材料成形技术与装备教育部工程研究中心,山西太原030024

出　　处：《塑性工程学报》2024年第9期60-65,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51975398)。

摘　　要：选择厚度为50μm的T2铜箔,在300~700℃的温度下退火5 min并进行表征试验、力学性能试验和微拉深(MDD)试验。系统研究了不同退火温度下铜箔的力学性能,进而分析了退火温度对铜箔微拉深成形件成形质量的影响规律。结果表明,铜箔经过退火处理后,随着再结晶的进行和晶粒长大,屈服强度降低,伸长率呈现先增加后减小的趋势。原始态铜箔的成形性较差,不能通过MDD成形得到完整的杯状成形件。退火温度为500℃时,铜箔再结晶完成,成形件表面几乎没有褶皱,此时表面质量较好。随着退火温度的进一步提高,表面起皱现象变得明显。500℃为铜箔的较优退火温度,能够显著提升铜箔微拉深成形件的成形精度及成形质量。T2 copper foils with thickness of 50μm were selected and annealed at 300-700℃ for 5 min and subjected to characterization tests,mechanical properties tests and micro deep drawing(MDD)tests.The mechanical properties of copper foils at different annealing temperatures were systematically studied,and the influence laws of annealing temperature on the forming quality of copper foils micro deep drawing forming parts were investigated.The results show that for the annealed copper foils,the yield strength decreases and the elongation tends to increase firstly and then decrease with the progress of recrystallization and grain growth.The formability of the original state copper foil is poor,and the complete cup-shaped parts cannot be formed by MDD.When the annealing temperature is 500℃,the copper foil recrystallization is completed,few wrinkles are characterized on the forming parts and high surface quality is obtained.With the further increase of annealing temperature,wrinkling on the surface becomes apparent.500℃ is optimal annealing temperature for copper foils,which can significantly improve the forming accuracy and forming quality of the copper foils micro deep drawing forming parts.

关 键 词：微拉深 铜箔 退火温度 起皱 成形性能 

分 类 号：TG386.32[金属学及工艺—金属压力加工]