| Ag-28Cu-8Sn alloy is a widely used brittle silver-based brazing filler metal. The wire of brazing filler metal prepared by continuous casting process and dieless drawing technology. The effects of two kinds of dieless drawing process parameters, heating temperature and drawing speed, on the microstructure, electrical conductivity, hardness, strength and elongation properties of Ag-28Cu-8Sn alloy were investigated. The results show that under the same drawing speed and reduction of the section, the phenomenon of“swallowing and growing up” causes the average size of the black and white phases of the horizontal and vertical sections to gradually increase with the increase of temperature, as well as the electrical conductivity and elongation accordingly, but the strength and hardness are reduced. Furthermore, based on the same heating temperature, the alloy phase size of the transverse and longitudinal sections gradually decreases with the increase of the drawing speed, and the hardness and strength increase, while the elongation and electrical conductivity decrease. |
