▎ 摘　　要

NOVELTY - Preparation of graphene-reinforced copper-niobium multi-core composite wire involves uniformly mixing graphene powder, niobium powder and copper powder, adding a tackifier and an alcohol ketone mixed solution to resultant mixture, drying, obtaining powder, heat-treating, obtaining graphene-reinforced niobium-copper composite powder, adding resultant powder to oxygen-free copper tube, performing vacuum-electron beam welding, drawing, molding, performing cluster drawing, molding and bundling. USE - Preparation of graphene-reinforced copper-niobium multi-core composite wire (claimed). ADVANTAGE - The method enables preparation of graphene-reinforced copper-niobium multi-core composite wire having excellent conductivity, scalability and strength. DETAILED DESCRIPTION - Preparation of graphene-reinforced copper-niobium multi-core composite wire involves uniformly mixing 0.5-4.76 %mass graphene powder, 47.62-49.75 %mass niobium powder and 47.62-49.75 %mass copper powder, adding a tackifier and an alcohol ketone mixed solution to resultant mixture, stirring, drying, obtaining powder, processing the powder in vacuum atmosphere or reducing atmosphere, heat-treating at 400-600 degrees C for 1-10 hours, obtaining graphene-reinforced niobium-copper composite powder, adding 15-30 %mass resultant powder to oxygen-free copper tube, performing vacuum-electron beam welding, drawing at drawing rate of more than 30%, obtaining single-core composite wire with hexagonal cross-sectional shape, molding, performing cluster drawing by cutting, straightening, pickling, vacuum-electron-beam welding and heat-treating at 750-850 degrees C for 10-14 hours, molding and bundling.