▎ 摘　　要

NOVELTY - Preparing gradient reinforced graphene magnesium-based composite material comprises (i) blending the graphene sheet into organic solvent to form graphene slurry, adding the magnesium ball powder and graphene slurry into the mechanical stirrer to stir, (ii) using the suction filter to filter the mixed liquid after stirring, filtering the organic solvent, (iii) ball milling, drying in the vacuum drier, (iv) turning the magnesium alloy hollow pipe and the magnesium sleeve, placing the magnesium alloy hollow pipe into the magnesium sleeve, (v) placing the aluminum ingot into the middle and low temperature box, pre-sintering, (vi) placing the pre-sintered aluminum ingot in the middle and low temperature furnace for heat preservation, and (vii) quickly placing the extruded bar in the middle and low temperature box for heat preservation. USE - The method is useful for preparing gradient reinforced graphene magnesium-based composite material. ADVANTAGE - The method improves toughness and high conductivity. DETAILED DESCRIPTION - Preparing gradient reinforced graphene magnesium-based composite material comprises (i) blending the graphene sheet into organic solvent to form graphene slurry, adding the magnesium ball powder and graphene slurry into the mechanical stirrer to stir, (ii) using the suction filter to filter the mixed liquid after stirring, filtering the organic solvent, (iii) placing the mixed solution after filtering in the low energy ball milling tank, ball milling, drying in the vacuum drier, (iv) turning the magnesium alloy hollow pipe and the magnesium sleeve, placing the magnesium alloy hollow pipe into the magnesium sleeve, where the center is overlapped, placing the mixed powder after ball milling into the magnesium alloy hollow pipe, using the hydraulic press to press the mixed powder, welding the magnesium bag cover to the top end of the magnesium sleeve, sealing the sleeve, (v) placing the aluminum ingot into the middle and low temperature box, pre-sintering, taking out and placing in the air, cooling to room temperature, (vi) placing the pre-sintered aluminum ingot in the middle and low temperature furnace for heat preservation, taking out and quickly extruding in the extruder to obtain the extruded bar material to obtain the composite material with high conductive inside, and (vii) quickly placing the extruded bar in the middle and low temperature box for heat preservation, rotary swaging to bar diameter of 90% to obtain the refined external crystal grain.