▎ 摘　　要

NOVELTY - Preparing graphene-reinforced titanium-based composite material comprises e.g. (1) adding spherical titanium powder to anhydrous ethanol, ultrasonic cleaning, drying; the particle size of the spherical titanium powder is 50-60 mu m; (2) adding the dried spherical titanium powder obtained in the step (1) to sulfuric acid solution with mass concentration of 1-5%, soaking, orderly washing it with deionized water and absolute ethanol, and drying; (3) adding the dried spherical titanium powder obtained in the step (2) to the nickel plating solution, heating, and drying to obtain nickel-plated spherical titanium powder; the thickness of nickel plating layer of nickel-plated spherical titanium powder is 100-300 nm; and (4) adding graphene oxide to deionized water, carrying ultrasonic dispersion to obtain graphene oxide dispersion, adding the nickel-plated spherical titanium powder obtained in step (3) to the graphene oxide dispersion, mechanically stirring, and drying to obtain mixed powder. USE - The method is useful for preparing graphene-reinforced titanium-based composite material. ADVANTAGE - The method: can improves mechanical properties of graphene-reinforced titanium-based composite material. DETAILED DESCRIPTION - Preparing graphene-reinforced titanium-based composite material comprises (1) adding spherical titanium powder to anhydrous ethanol, ultrasonic cleaning for 10-30 minutes, drying at 40-60 degrees C for 10-20 hours; the particle size of the spherical titanium powder is 50-60 mu m; (2) adding the dried spherical titanium powder obtained in the step (1) to sulfuric acid solution with mass concentration of 1-5%, soaking for 10-20 minutes, orderly washing it with deionized water and absolute ethanol, and drying for 12-24 hours; (3) adding the dried spherical titanium powder obtained in the step (2) to the nickel plating solution, heating to 40-60 degrees C for 10-120 minutes, and drying to obtain nickel-plated spherical titanium powder; the thickness of nickel plating layer of nickel-plated spherical titanium powder is 100-300 nm; (4) adding graphene oxide to deionized water, carrying ultrasonic dispersion for 60-120 minutes to obtain graphene oxide dispersion, adding the nickel-plated spherical titanium powder obtained in step (3) to the graphene oxide dispersion, mechanically stirring at 70-90 degrees C, and drying to obtain mixed powder; and (5) adding the mixed powder obtained in step (4) into mold, placing in discharge plasma hot-press sintering furnace for discharge plasma hot-press sintering, cooling to obtain graphene-reinforced titanium-based composite material; where the process parameters of the discharge plasma hot-pressing sintering includes vacuum degree of 1x 10-3 to 3x 10-3 Pa, the heating rate is 50-100 degrees C/minute, the temperature is 800-1200 degrees C, the pressure is 40-300 MPa, and keeping the temperature for 5-20 minutes.