Microstructure and mechanical properties of brazing joint of silver-based composite filler metal

Microstructure and mechanical properties of brazing joint of silver-based composite filler metal

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In this article, environmental friendly BAg25Cu40Zn34Sn (BAg-25) and BAg30Cu37Zn32Sn (BAg-30) flux-core solder metal capable of facilitating automatic Ski de fond - Enfant - Sous-Vetements production of brazing manufacturing processes were prepared.The butt and lap induction brazing tests were carried out on the substrate with BAg-25 and BAg-30.Wettability, microstructure and mechanical properties of the solders on the base metal were studied by field emission scanning electron microscope (SEM-EDS), electron backscattering diffraction (EBSD), tensile testing machine and microhardness tester.Results indicated that the wetting property of BAg-30 with 30% silver content was better than that of BAg-25 with 25% silver content.

At the same time, besides copper and silver-based solid solutions, the brazed joint of BAg-30 solder Pepper Mills also contain Cu + Ag eutectic phase.In the brazed joint of BAg-25 solder, the grain size is smaller, which makes the tensile strength and the shear strength of the joints better.Therefore, the BAg-25 flux-core solder metal will further reduce the industrial cost and meet the requirements of mechanical properties.