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.
作者
杨勇
李慧中
梁霄鹏
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)
出处
《湖南有色金属》
CAS
2020年第3期40-45,共6页
Hunan Nonferrous Metals
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
explosive welding
cold rolled Cu/Al composite sheets
annealing heat treatment
mechanical properties
conductivity
