The obtaining of spherulites in the as-cast structure of silver-copper alloy will provide the possibility of preparing electrical contact materials for silver-copper alloys with low silver and high copper content.In this paper,Co and Si elements were added to silver-copper alloy(w(Cu)=50.0 %).The metallographic and microstructure of the silver-copper alloy were observed by metallographic microscope and scanning electron microscope.The experimental results show that the addition of Co and Si elements alone does not produce spherulitic structure;when the Co-Si element is added in combination,the copper-rich phase dendrites are broken,the grains are spheroidized,and the spherulite structure appears.This phase spherulite structure consists of 3-layer structure with black core CoSix compound particles,copper-rich phase in the gray region,and silver-rich phase in the white region.