▎ 摘　　要

NOVELTY - Molding graphene composite aluminum-based material castings comprises e.g. (i) performing surface treatment of rod-shaped aluminum alloy particles to obtain mixed particles, (ii) turning on the high-temperature pressing and adjusting the first heater on pressing mold, (iii) performing semi-solid melting, (iv) direct squeeze casting molding, (v) wire brushing for cleaning parts and surroundings of the graphene composite aluminum-based material castings, then using absolute ethanol to clean the graphene composite aluminum-based material castings, drying, and (vi) detecting, analyzing, characterizing the morphology, using electronic universal testing machine to analyze tensile strength and elongation, using Vickers hardness tester for hardness analysis. USE - The method is useful for molding graphene composite aluminum-based material castings. ADVANTAGE - The material castings: has excellent internal structure and compactness, no shrinkage, shrinkage defects, round grains, small, tensile strength of 366 MPa, the elongation rate of 5.3% and the hardness reaches 106 HV. DETAILED DESCRIPTION - Molding graphene composite aluminum-based material castings comprises mixing by taking grams and milliliters as unit of measurement, ZL101 solid block 5000 g plus minus 1 g graphene solid powder 15 g plus minus 0.1 g polyvinyl alcohol, ethylene oxide solid powder 540 g plus minus 10 g deionized water, water liquid 51000 ml plus minus 500 ml absolute ethanol, ethanol liquid 2000 ml plus minus 100 ml diatomite release agent liquid 115 ml plus minus 5 ml system; prepared by (i) performing surface treatment of rod-shaped aluminum alloy particles to obtain mixed particles (a) cutting rod-shaped aluminum alloy particles using metal particle cutting machine to cut 1000 g aluminum alloy ingots into lengths of 10 mm plus minus 1.5 mm, rod-shaped aluminum alloy particles with cross-sectional equivalent diameter of phi 0.85 plus minus 0.15 mm, (b) adding 18000 ml deionized water into polyvinyl alcohol solution box in the mixed particle preparation room, turning on and adjusting first thermostat in poly(vinyl alcohol) solution tank, keep the temperature of deionized water at 85 degrees C, then adding 540 g polyvinyl alcohol, holding for 0.5 hour, turning on first ultrasonic vibrating table under the polyvinyl alcohol solution tank to vibrate and stirring, dissolving polyvinyl alcohol completely, turning off the first ultrasonic vibration table and the first thermostat to prepare polyvinyl alcohol solution, (c) graphene dispersion is prepared by oxidation-reduction method to obtain lateral dimension of 8 mu m plus minus 2 mu m, graphene with oxygen content of 15.5 wt.% plus minus 2wt.%, adding 15000 ml deionized water to the graphene dispersion tank in the mixed particle preparation room, then adding 15 g graphene, turning on third ultrasonic vibrating table below the graphene dispersion tank for vibration stirring, stirring time is 40 minutes, then turning off the third ultrasonic vibration table to obtain graphene dispersion, (d) performing surface treatment of rod-shaped aluminum alloy particles, placing the rod-shaped aluminum alloy particles into processing box, and then placing the processing box into polyvinyl alcohol solution box using the monorail locomotive and tongs, soaking all the rod-shaped aluminum alloy particles into polyvinyl alcohol solution, turning on and adjusting the first thermostat, keep the temperature of the polyvinyl alcohol solution at 60 degrees C to plus minus 2 degrees C, after 15 minutes, turning on the first ultrasonic vibration table for constant temperature vibration and stirring, stirring for 60 minutes, then turning off the first ultrasonic vibration table and first thermostat, (e) washing the rod-shaped aluminum alloy particles and adding 18,000 ml deionized water into deionized water tank in the mixed particle preparation room, and then removing the processing tank from polyvinyl alcohol solution tank using monorail locomotive and tongs and placing into deionized water tank, soaking all the rod-shaped aluminum alloy particles in deionized water, turning on and adjusting the second thermostat in deionized water tank, maintaining the temperature of deionized water at 60 degrees C to plus minus 2 degrees C, then turning on the second ultrasonic vibration table under the deionized water tank for vibration cleaning, the cleaning time is 10 minutes, then turning off the second ultrasonic vibration table and second thermostat, taking out treated tank from deionized water tank using monorail locomotive and tongs, placing into heating dryer, then turning on the heating dryer to dry the rod-shaped aluminum alloy particles, the drying temperature is 80 degrees C, the drying time is 25 minutes, then turning off the heating dryer, (f) placing processing box into graphene dispersion tank using monorail locomotive and tongs, soaking all the rod-shaped aluminum alloy particles in the graphene dispersion, turning on and adjusting the third thermostat in graphene dispersion tank, maintaining the temperature of graphene dispersion at 45 degrees C to plus minus 2 degrees C, holding for 5 minutes, turning on the third ultrasonic vibrating table for constant temperature vibration and stirring, stirring for every 15 minutes, pausing stirring for 10 minutes, stirring 4 times, then turning off the third ultrasonic vibration table and third thermostat, allowing to stand for 20 minutes, take outing processing tank from the graphene dispersion tank using monorail locomotive and tongs, then placing the rod-shaped aluminum alloy particles adsorbed with graphene into constant temperature oven for drying, the drying temperature is 70 degrees C, the drying time is 45 minutes, after drying taking out to obtain mixed particles, (ii) turning on the high-temperature pressing and adjusting the first heater on pressing mold, the first heater preheats the concave and convex molds of the pressing mold, the preheating temperature is 410 degrees C, placing the mixed particles into concave mold of the pressing mold, and then close the pressing mold, maintaining constant temperature pressure, the holding pressure is 200 MPa, holding pressure time is 10 minutes to obtain mixed particle block, opening the pressing mold, and pushing out the mixed particle block from ejector pin of the pressing mold, then removing the mixed particle block, placing on steel plate and cooling to room temperature, and setting aside for further use.