热处理对冷轧爆炸复合Cu/Al薄板组织、力学性能及电导率的影响  

Effect of Annealing on the Microstructure,Mechanical Properties and Conductivity of Cold-rolled Explosive Cu/Al Composite Sheets

作　　者：杨勇[1] 李慧中[1,2,3] 梁霄鹏[1,2,3] 曾志恒 YANG Yong;LI Hui-zhong;LIANG Xiao-peng;ZENG Zhi-heng(School of Materials Science and Engineering,Central South University,Changsha 410083,China;Key Laboratory of Nonferrous Metal Materials Science and Engineering,Ministry of Education,Central South University,Changsha 410083,China;State Key Laboratory of Powder Metallurgy,Central South Unitersity,Changsha 410083,China;Hunan Phohom New Material Technology Co.,Ltd.,Changsha 410083,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]中南大学粉末冶金国家重点实验室,湖南长沙410083 [3]中南大学有色金属材料科学与工程教育部重点实验室,湖南长沙410083 [4]湖南方恒新材料技术股份有限公司,湖南长沙410083

出　　处：《湖南有色金属》2020年第3期40-45,共6页Hunan Nonferrous Metals

摘　　要：将20 mm厚Cu/Al爆炸复合板材经过6道次冷轧后获得1.5 mm厚的Cu/Al复合薄板。研究了热处理对冷轧后Cu/Al复合薄板的组织、力学性能和电导率的影响。结果表明,界面化合物Al2Cu,AlCu和Al4Cu9的扩散层厚度随退火温度和退火时间的增加而增加。随着退火温度的升高,复合材料的抗拉强度降低,断裂伸长率增加。当退火温度从300℃提高到350℃时,拉伸屈服强度从225 MPa降低到77 MPa,伸长率从16%增加到37.5%。当退火温度低于400℃时,复合薄板的拉伸剪切强度随着退火温度的升高而增加。复合薄板的电导率受退火时间的影响较为明显,在350℃退火4 h后复合板的电导率达到最大值96.4%IACS(国际退火铜标准)。The 1.5 mm thick Cu/Al composite sheet was obtained after explosive-welding and 6 passes cold rolling.The effects of annealing heat treatment on the microstructure,mechanical properties,and conductivity of cold-rolled Cu/Al composite sheets were investigated.The results show that the thickness of the interface diffusion layer with compounds of Al2Cu,AlCu,and Al4Cu9 increases with the increase in annealing temperature and holding time.The tensile strength of composite sheets decreases and the fracture elongation increases with the increase of annealing temperature.Especially when the annealing temperature increased from 300 ℃ to 350 ℃,the tensile yield strength decreased from 225 MPa to 77 MPa,and the elongation increased from 16% to 37.5%.When the annealing temperature lower than 400 ℃,the tensile-shear strength of composite sheets increases with the increase of annealing temperature.The conductivity of composite sheet is greatly affected by the annealing time.At the annealing temperature of 350 ℃ and time of 4 hours,the composite sheets show a better conductivity of 96.4%IACS.

关 键 词：爆炸焊接 冷轧铜铝复合板 退火热处理 力学性能 电导率 

分 类 号：TG113.2[金属学及工艺—物理冶金]