▎ 摘　　要

NOVELTY - Low chrome alloy grinding balls comprises 2-3.3 wt.% carbon, 1.75-2.2 wt.% silicon, 1.3-2.6 wt.% manganese, 1.5-2.5 wt.% chromium, 0.25-0.50 wt.% copper, 0.05-0.12 wt.% titanium, 0.5-1 wt.% graphene, less than or equal to 0.02 wt.% sulfur, less than or equal to 0.02 wt.% phosphorus and iron (balance amount). USE - Used as low chrome alloy grinding balls. ADVANTAGE - The ball reduces the content of noble metal Mo, reduces the cost, has high high-chromium cast alloy material, can reach 60 HRC, has strong impact toughness, the impact value reaches 12 J/cm2, falling-ball impact fatigue life greater than or equal to 9500 times, the crushing rate is less than 0.9% and the cost is reduced. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing low chromium alloy grinding ball comprising (1) smelting raw materials by adding raw materials into a frequency furnace for smelting, using molten iron obtained from the smelting, the melting temperature is 1640-1680 degrees C, the temperature of the molten iron is 1500-1550 degrees C, (4) pouring molten iron to obtain perform, pouring temperature is 1410-1440 degrees C, (5) placing preform in the furnace, heating at 100-150 degrees C/hour, when the temperature in the furnace reaches 800-850 degrees C for 2 hours (6) natural cooling with furnace, tempering at 240-260 degrees C for 1.4-1.8 hours.