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Research on Rolling and Annealing of Brazing Composite Ag/Cu Strip
Author(s): 
Pages: 18-23
Year: Issue:  3
Journal: Precious Metals

Keyword:  metal materialsAg/Cu compositebrazingrollingannealingatomic diffusion;
Abstract: The Ag/Cu composite fillet prepared using Ag-28Cu brazing, was rolled into composite strip. The effects of rolling and diffusion annealing on composite interface morphology, microstructure and properties of interface were studied. And the diffusion characteristics of elements on interface were investigated. The results show that with the increase of rolling reduction, the deforms of Cu, Ag-28Cu and Ag were resulted coordinately. The interface of composite turns into zigzag form wavy, Cu layer inclines to the Ag layer finally. With the increase of processing rate, the hardness of Cu layer decreases gradually, the hardness of Ag-28Cu layer elevates significantly, the hardness of Ag layer unchanged. As the annealing temperature increasing, the interface structure grow gradually and the width of composite layer increases. The behavior of interface atomic diffusion is that Cu atoms mainly diffuse to the Ag. With annealing temperature increasing, Cu atoms in Ag-28Cu layer to Ag side reduces gradually, but Cu atoms in Ag layer increases. As annealing temperature increasing, the hardnesses of Cu and Ag layer have not changed, while the hardness of Ag-28Cu layer is decreased gradually.
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