▎ 摘　　要

NOVELTY - Preparation of graphene coating alloy powder composite material involves preparing alloy powder with particle size of less than or equal to 53 mu m; adding with 0.5-1.0% cetyltrimethylammonium bromide solution; stirring for 0.5-2.0 hours to obtain surfactant-coated alloy powder; washing with distilled water; drying at 50-120 degrees C for 5-12 hours; mixing treated alloy powder with oxidized graphene solution; stirring until to obtain graphene-alloy composite powder solution; drying in vacuum oven at 50-120 degrees C for 5-12 hours; and sintering under less than or equal to 7x 103 Pa vacuum at 600-1000 degrees C for 1-3 hours. USE - Preparation of graphene coating alloy powder composite material used for 3D printing. ADVANTAGE - The method can make graphene more uniformly coated on surface of metal powder, thus avoiding agglomeration of graphene in metal matrix. DETAILED DESCRIPTION - Preparation of graphene coating alloy powder composite material comprises taking alloy powder as coated raw material prepared via electrode induced gas atomization method or vacuum induction gas atomization method; sieving powder for 2-3 times via ultrasonic vibration screening machine to obtain alloy powder with particle size of less than or equal to 53 mu m; adding alloy powder with 0.5-1.0% cetyltrimethylammonium bromide solution; stirring at room temperature for 0.5-2.0 hours to obtain surfactant-coated alloy powder having cetyltrimethylammonium bromide content of 0.1-1 mass%; washing with distilled water to remove surfactant; drying in vacuum oven at 50-120 degrees C for 5-12 hours to obtain treated alloy powder; mixing treated alloy powder with oxidized graphene solution; stirring until color of solution changed from dark brown to colorless and transparent to obtain graphene-alloy composite powder solution with graphene oxide content of 0.1-1.0 mass%; drying in vacuum oven at 50-120 degrees C for 5-12 hours to obtain oxide graphene-coated alloy powder; placing graphene-coated alloy powder in vacuum furnace under less than or equal to 7x 103 Pa vacuum; and sintering at 600-1000 degrees C for 1-3 hours to obtain graphene coated alloy powder. DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of a process for preparing graphene coating alloy powder composite material (Drawing includes non-English language text).