▎ 摘　　要

NOVELTY - Preparing wear-resistant coating involves adding 12-14 pts. wt. graphene to absolute ethanol whose volume is 5-10 times, using ultrasonic device, performing ultrasound at 50-56 kilohertz for 30-40 minutes, and then applying alternating current for 12-14 minutes, filtering, transferring the obtained graphene to ball mill, ball milling at 80-83 degrees C, 600-800 revolution per minute for 5-10 minutes, placing in vacuum dryer, and vacuum drying at 50-54 degrees C for 10-14 hours, ready for use. The 10-12 pts. wt. tungsten phosphate is dissolved in 5-6 times the volume of absolute ethanol, then 12-14 pts. wt. product obtained is added, and ultrasonically dispersed for 10-14 minutes at 38-40 kilohertz at 34-36 degrees C, 200-300 revolution per minute and constant temperature stirring for 20-22 hours followed by heating and rotary evaporation to remove most of the absolute ethanol to obtain paste. USE - Method for preparing wear-resistant coating for circuit breaker shell. ADVANTAGE - The method enables to prepare wear-resistant coating that is suitable for multiple complex working environments and protective applications of circuit breaker, has good wear resistance, high hardness and good corrosion resistance, improves hardness of graphene sheet, enhances structural complexity, and increases bonding force with substrate. DETAILED DESCRIPTION - Preparing wear-resistant coating involves adding 12-14 pts. wt. graphene to absolute ethanol whose volume is 5-10 times, using ultrasonic device, ultrasound at 50-56 kilohertz for 30-40 minutes, and then applying AC for 12-14 minutes, filtering, transferring the obtained graphene to ball mill, ball milling at 80-83 degrees C, 600-800 revolution per minute for 5-10 minutes, placing in vacuum dryer, and vacuum drying at 50-54 degrees C for 10-14 hours, ready for use. The 10-12 pts. wt. tungsten phosphate is dissolved in 5-6 times the volume of absolute ethanol, then 12-14 pts. wt. product obtained is added, and ultrasonically dispersed for 10-14 minutes at 38-40 kilohertz at 34-36 degrees C, 200-300 revolution per minute and constant temperature stirring for 20-22 hours followed by heating and rotary evaporation to remove most of the absolute ethanol to obtain paste. The resulting paste is placed in tube furnace, and passed nitrogen gas after 30-40 minutes, changes the nitrogen to mixed gas of methane and hydrogen, and then increases the temperature to 500-600 degrees C at rate of 3-5 degrees C/minute, kept warm for 30-40 minutes, then continued to heat up to 760-780 degrees C, kept warm for 20-30 minutes, then heated up to 903-905 degrees C, after holding for 60-70 minutes. The temperature is reduced to 400-420 degrees C at rate of 4-6 degrees C/minute. The mixed gas of methane and hydrogen is replaced with nitrogen, and cooling is continued to room temperature to obtain tungsten carbide-graphene composite. The 20-30 pts. wt. methyl acrylate, 50-60 pts. wt. butyl methacrylate, and 20-25 pts. wt. acrylic acid are added, then 100-150 pts. wt. deionized water and 5-10 pts. wt. emulsifier are added, stirred and emulsified at 40-50 degrees C for 20-30 minutes. The 14-16 pts. wt. product obtained, 0.5-0.6 pts. wt. potassium persulfate are added, and refluxed at 80-82 degrees C with 300-500 revolution per minute for 5-6 hours, and then cooled.