▎ 摘　　要

NOVELTY - Producing composite copper-silver alloy wire involves adding graphene oxide to the mixed solvent, adding a mixed additive of 0.15-0.2 wt.% graphene oxide, and ultrasonically dispersing for 20 minutes the solid content is 0.01-0.05 g/L. The graphene oxide dispersion is obtained, placed the above graphite oxide dispersion into a vacuum furnace, under the protection of nitrogen, and kept at 400-500 degrees C for 1-2 hours. The temperature is increased to 600-700 degrees C, calcined in vacuum for 2-4 hours, cooled to room temperature, added it to a hydrochloric acid solution with a mass concentration of 20-40%, stirred for 3-4 hours under nitrogen protection, separated the precipitate, dried, treated it at 2000-2100 degrees C for 3-6 hours and cooled to get nano graphene. The 6-8 wt.% silver powder, 0.2-0.6 wt.% nano graphene, and the balance is copper powder are taken for use. The copper powder and silver powder are added into the vacuum melting furnace at one time, and started vacuuming. USE - Method for producing composite copper-silver alloy wire. ADVANTAGE - The method enables to produce composite copper-silver alloy wire has simple operation, easy access to raw materials, low silver content required, and excellent tensile strength and electrical conductivity. DETAILED DESCRIPTION - Producing composite copper-silver alloy wire involves adding graphene oxide to the mixed solvent, adding a mixed additive of 0.15-0.2 wt.% graphene oxide, and ultrasonically dispersing for 20 minutes the solid content is 0.01-0.05 g/L. The graphene oxide dispersion is obtained, placed the above graphite oxide dispersion into a vacuum furnace, under the protection of nitrogen, and kept at 400-500 degrees C for 1-2 hours. The temperature is increased to 600-700 degrees C, calcined in vacuum for 2-4 hours, cooled to room temperature, added it to a hydrochloric acid solution with a mass concentration of 20-40%, stirred for 3-4 hours under nitrogen protection, separated the precipitate, dried, treated it at 2000-2100 degrees C for 3-6 hours and cooled to get nano graphene. The 6-8 wt.% silver powder, 0.2-0.6 wt.% nano graphene, and the balance is copper powder are taken for use. The copper powder and silver powder are added into the vacuum melting furnace at one time, and started vacuuming. The argon is introduced when the vacuum in the furnace reaches 1-5 pascal (Pa). The temperature is increased to make the temperature in the furnace reach 1260-1380 degrees C and smelted to obtain copper-silver alloy melt. The copper-silver alloy melt is divided into three parts, namely copper-silver alloy melt I and copper-silver alloy melt II and copper-silver alloy melt III, and copper-silver alloy melt I is poured. The copper-silver alloy initial column, and divide the nano graphene weighed is obtained into two parts which is nanographene A and nanographene B. The argon is used to uniformly disperse the nano-graphene A on the surface of the copper-silver alloy initial cylinder, then sequentially pouring copper-silver alloy melt II, using argon gas to uniformly disperse nanographene B on the surface of the newly formed copper-silver alloy cylinder, and pouring copper-silver alloy melt III. The program is cooled to 100 degrees C, and the graphene-copper-silver alloy cylinder is obtained. The hot extrusion on the graphene-copper-silver alloy cylinder is performed at 650-700 degrees C. The holding time is 1.5-2.5 hours, the extrusion ratio is 6-8. The graphene-copper-silver alloy cylindrical wire is obtained, which is then drawn and cut to obtain the nano-graphene composite copper-silver alloy wire.