▎ 摘　　要

NOVELTY - Processing high-hardness brazing diamond grinding wheel comprises soaking diamond particles in a sodium hydroxide solution to remove oil, ultrasonically cleaning with deionized water to neutrality, placing in a nitric acid solution for coarsening, placing the diamond particles in stannous chloride, sensitizing in a hydrochloric acid mixture, ultrasonic dispersing for 5-10 minutes, and then ultrasonic cleaning with deionized water until neutral. The sensitized diamond particles are transferred to a mixed solution of palladium chloride and hydrochloric acid, ultrasonically dispersed for 5-10 minutes, ultrasonically cleaned with deionized water until neutral, placed in a sodium hypophosphite solution under stirring for 5-10 minutes, washed with deionized water, transferred to a nickel-plating solution, plated a composite nickel layer on the surface of the diamond particles, and dried at 80-90degrees Celsius to obtain core-shell diamond particles. USE - Method for processing high-hardness brazing diamond grinding wheel used for engineering ceramics, alloy hard glass, precise grinding of hard and brittle materials such as a semiconductor. ADVANTAGE - The processing-hardness brazing diamond grinding wheel has excellent mechanical property and self-lubricating property, improves the hardness and wear resistance of the grinding wheel, and improves whole grinding performance. DETAILED DESCRIPTION - Processing high-hardness brazing diamond grinding wheel comprises soaking diamond particles in a sodium hydroxide solution to remove oil, ultrasonically cleaning with deionized water to neutrality, placing in a nitric acid solution for coarsening, placing the diamond particles in stannous chloride, sensitizing in a hydrochloric acid mixture, ultrasonic dispersing for 5-10 minutes, and then ultrasonic cleaning with deionized water until neutral. The sensitized diamond particles are transferred to a mixed solution of palladium chloride and hydrochloric acid, ultrasonically dispersed for 5-10 minutes, ultrasonically cleaned with deionized water until neutral, placed in a sodium hypophosphite solution under stirring for 5-10 minutes, washed with deionized water, transferred to a nickel-plating solution, plated a composite nickel layer on the surface of the diamond particles, and dried at 80-90degrees Celsius to obtain core-shell diamond particles. The diamond particles are ultrasonically cleaned with acetone solution, mixed with a brazing alloy powder, mixed with binder and magnesium oxide powder at 900-950degrees Celsius for 10-15 minutes, and sieved to obtain brazed diamond particles. Take core-shell diamond particles, brazing diamond particles, and phenolic resin solution are mixed with phenolic resin powder, silicon carbide powder, copper powder, graphene oxide, zinc stearate, and hollow glass microspheres, hot pressed, demolded, heat-treated, and naturally cooled to obtain the finished products.