▎ 摘　　要

NOVELTY - Preparing graphene modified aluminum-based composite wire involves weighing metal aluminum powder, graphene, ceramic matrix composite (CMC) and deionized water in proportion and placing in stirring kettle, stirring at 100 revolutions/minute (rpm) for 2 hours to obtain mixed solution. USE - Method for preparing graphene modified aluminum-based composite wire used in aerospace, space industry and high-speed train. ADVANTAGE - The method enables to prepare graphene modified aluminum-based composite wire that has highly light and good conductivity of graphene, excellent thermal conductivity. The method enables to overcome the existing powder solid phase mixing method existing in ball milling, stirring and mixing process of metal aluminum powder and graphene under solid phase conditions, and agglomerated graphene is difficult to disperse, and quality difference between the two is huge, and defects that are difficult to be uniformly mixed. The liquid phase method is used to prepare metal aluminum powder and graphene slurry and spray pelletizing method, atmosphere protection cold pressure welding press cake, atmosphere protection ultrasonic die casting realizes uniform distribution of graphene in aluminum-based material system. DETAILED DESCRIPTION - Preparing graphene modified aluminum-based composite wire involves weighing metal aluminum powder, graphene, ceramic matrix composite (CMC) and deionized water in proportion and placing in stirring kettle, stirring at 100 revolutions/minute (rpm) for 2 hours to obtain mixed solution. The obtained mixed solution is ground using sand mill, so that agglomerated graphene and CMC are dispersed in deionized water to obtain sand grinding slurry. The sand mill slurry is sprayed and dried by centrifugal spray drying tower to obtain dried graphene- coated metal aluminum spherical powder. The dried graphene coated metal aluminum spherical powder is spray pelleted to obtain graphene coated spherical powder atmosphere-protected cold-pressed welding to obtain cold-pressed welded round cake. An ultrasonic die-casting process is performed on cold-pressed welded round cake under atmosphere protection. The obtained cold-cast round cake is laminated and placed in cylindrical mold to be melted and solidified to obtain vacuum-casting cylindrical rod material. The vacuum ingot cylindrical rod material is drawn by wire drawing mold, and placed into furnace cavity of vacuum annealing furnace, so that cylindrical rod material drawn by drawing mold is uniformly annealed. The cylindrical rod material is drawn with wire drawing mold, where each drawing is drawn with a small reduction rate of section, and diameter of finished product is achieved by multiple drawing. The cylindrical rod material is vacuum annealed. The vacuum annealed cylindrical rod material is drawn under atmosphere protection again. The cylindrical rod material after atmosphere protection drawing is vacuum annealed again, and insulating material is coated. An INDEPENDENT CLAIM is included for a graphene modified aluminum based composite wire, which comprises metal aluminum powder, graphene and CMC carbide, where graphene and CMC carbide are distributed in metal aluminum tissue structure. DESCRIPTION OF DRAWING(S) - The drawing shows flowchart of a method for preparing graphene modified aluminum-based composite wire. (Drawing includes non-English language text). Weighing metal aluminum powder, graphene, ceramic matrix composite and deionized water in appropriate proportion and placing in stirring kettle (S01) Stirring and mixing under normal temperature to obtain mixed solution (S02) Performing sand-milling for dispersion (S03) Spraying mixture to make balls (S04) Obtaining atmosphere protection cold pressure welding press cake (S05) Performing atmosphere protected ultrasonic die casting (S06) Melting ingot in vacuum and casting (S07) Drawing under the protection of atmosphere (S08) Carrying out vacuum annealing (S09) Drawing under the protection of atmosphere (S10) Carrying out vacuum annealing (S11) Drawing under the protection of atmosphere (S12) Carrying out vacuum annealing (S13) Coating insulating material on the surface of substrate (S14)