摘要
采用微机控制固定间隙超声波辅助汽车零部件焊接中Cu/Al异质金属的钎焊工艺,在钎焊温度为380、420和460℃时制备Cu/Zn-3Al/Al钎焊接头,观察了不同温度超声钎焊时接头的显微组织与力学性能变化。结果表明,当钎焊温度为380℃时,钎缝层由Zn-Al共晶、α-Al树枝状晶和CuZn5相组成;当钎焊温度为420和460℃时,发现钎缝层由α-Al树枝晶、CuZn5相和Al4.2Cu3.2Zn0.7相组成;在钎焊温度为420℃时,金属间化合物层厚度为1.9μm,扩散层厚度为1.3μm,整个界面层厚度为3种钎焊温度下的最低值,此时钎焊接头的抗拉强度最大。
By brazing technology of Cu/Al heterogeneous metal with fixed gap ultrasonic assisted based on microcomputer control,the change of microstructure and mechanical properties of the Cu/Zn-3Al/Al joint prepare were observed with the ultrasonic soldering temperature at 380℃,420℃and 460℃.The results show that at 380 ℃,brazing layer is composed of Zn-Al eutectic,α-Al dendrites and CuZn5 phases while the brazing temperature is 420 ℃ and 460 ℃,brazing layer is composed ofα-Al dendrites,CuZn5 phase and Al4.2Cu3.2Zn0.7phase.In addition,at 420 ℃,intermetallic compound layer thickness reaches 1.9μm with diffusion layer thickness of 1.3μm,where the interface layer thickness is the minimum value for the three brazing temperature,and the tensile strength of the joint reaches maximum value.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2015年第10期1033-1036,共4页
Special Casting & Nonferrous Alloys
关键词
微机控制
钎焊
CU/AL
组织
力学性能
Computer Control
Brazing
Cu/Al
Microstructure
Mechanical Properties