Graphene copper pantograph pan material for high-speed trains and preparation method thereof

A method for preparing a graphene copper pantograph pan material for high-speed trains, wherein the method comprises the following steps:

• (1) first, uniformly dispersing graphene, additive and carbon nanotube in a polyvinyl alcohol solution with the concentration of 8.5% according to the mass ratio of the components of the graphene copper pantograph pan material, wherein the mass ratio of graphene to polyvinyl alcohol is 1:10, then adding copper powder, iron powder, coke and graphite fiber to the mixed solution in sequence, and stirring uniformly;
• the graphene copper pantograph pan material comprises the following components by mass ratio:
• wherein 2.0-11.0 wt % of graphene, 30.5-60.5 wt % of copper powder, 1.0-19.0 wt % of iron powder, 8.0-37.0 wt % of coke, 1.0-5.0 wt % of carbon nanotube, 0.4-6.2 wt % of graphite fiber and 0.06-0.25 wt % of additive;
• the additive is formed by mixing titanium powder of 600-800 meshes, tungsten powder of 800-1200 meshes and molybdenum powder of 900-1200 meshes, and the mass ration of titanium powder to tungsten powder to molybdenum powder is 1:3:5;
• (2) drying the mixed solution prepared in step (1) in vacuum, wherein the drying temperature is 30° C.-50° C.;
• (3) taking out the dried material and placing in the sample hot-pressing groove of a hot press for direct vacuum hot pressing, wherein the pressure intensity for hot pressing is 40-120 MPa, the temperature is 850° C.-1200° C., and the holding time is 8-20 min, thus obtaining a graphene copper pantograph pan material.