▎ 摘　　要

NOVELTY - Processing of low-chromium alloy wear-resistant ball involves (1) feeding raw materials into a high frequency electric furnace, smelting at 1640-1680 degrees C and obtaining a molten iron at 1500-1550 degrees C, (2) casting the molten iron at 1410-1440 degrees C, obtaining a prefabricated component, (3) cooling, and grinding the prefabricated component into nano powder, adding 0.5-2 wt.% graphene, mixing, heating to 2200-2300 degrees C, casting at 1500-1520 degrees C, (4) heating to 800-850 degrees C at 100-150 degrees C/hour and heat-preserving for 2 hours, (5) cooling with the furnace, and tempering at 240-260 degrees C for 1.4-1.8 hours. The raw materials comprise 2.0-3.3 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, 0.02 wt.% or less sulfur, 0.02 wt.% or less phosphorus, and balance iron. USE - Processing of low-chromium alloy wear-resistant ball. ADVANTAGE - The method provides low-chromium alloy wear-resistant ball with strong impact toughness, and is economical. The prepared wear-resistant ball has hardness (HRC) of 65, impact value of 16 J/cm2, falling-ball impact fatigue life of 9500 times or more, and crushing rate of less than 0.9%.