▎ 摘　　要

NOVELTY - A pulverizer tungsten steel blades heat treatment process comprises heating tungsten steel blade at 630-670 degrees C for 22-26 hours, cooling to 80-120 degrees C, taking out, and cooling naturally in the air. USE - The pulverizer tungsten steel blades heat treatment process. ADVANTAGE - The method enables improving toughness of the tungsten steel blade. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the preparation of chromium-graphene composite material comprising adding 10-20 pts. wt. surfactant to 100-120 pts. wt. water, stirring and dissolving, adding 40-50 pts. wt. chromium powder, stirring for 0.5-1 hour to obtain mixture, adding 0.5-0.7 pt. wt. graphene to 10-12 pts. wt. water, stirring for 30-50 minutes, ultrasonicating for 30-70 minutes to obtain graphene dispersion, adding mixture, stirring for 1-2 hours, filtering to obtain solid, and drying.