退火处理对铜铝复合材料扩散层组织和性能的影响

Effects of annealing on microstructure and mechanical properties of Cu/Al composite materials diffusion layer

研究了退火处理对采用挤压铸造制备的铜铝复合材料扩散层组织和性能的影响。结果表明,铜铝复合材料扩散层的厚度随退火温度的增加而显著增加。当温度升高到400℃时,扩散层的厚度可达到20μm左右。在相同退火温度下,随着保温时间的增加,铜铝结合强度先增加后减小,退火工艺以350℃×1 h为宜,可有效降低铜铝复合材料扩散层的硬度,有利于提高结合强度及加工性能。

Influence of annealing on microstructure and properties of copper aluminum composite materials diffusion layer which prepared by squeeze casting was investigated. The results show that the thickness of Cu/Al composite materials diffusion layer increases significantly with the increase of annealing temperature. The thickness of the diffusion layer reaches 20 μm, when the annealing temperature rises to 400 ℃. At the same annealing temperature, with the heating time increasing Cu/Al bonding strength first increases then decreases. The best annealing processes is 350 ℃- 1 h, which reduces diffusion layer hardness effectively, and is beneficial to improve the bonding strength and processing performance.