针对我国镍、铬、钼合金资源短缺的现状，本文提出开展以铌为主要合金元素的铌合金球铁轧辊的研制。在２ｔ／ｈ冲天炉内熔炼铌合金铸铁，用包头４＃稀土镁合金进行球化处理，研制成功的铌球铁轧辊其机械性能达到甚至超过了目前工业生产中广泛使用的铬钼无限冷硬球墨铸铁轧辊的水平。工业应用表明，该轧辊的使用寿命也可比铬钼无限冷硬球墨铸铁轧辊高１５～３０％。 In view of the current shortage of nickel, chromium and molybdenum alloys in our country, this paper proposes the development of niobium alloy ductile iron roll with niobium as the main alloying element. Niobium alloy cast iron is melted in a 2t / h cupola, and the nodular cast iron 4 # is used for nodular cast iron. The developed niobium ductile iron roll has mechanical properties up to and beyond that of chrome molybdenum infinity chromate widely used in industrial production Ductile iron roll level. Industrial applications show that the service life of this roll can also be 15-30% higher than that of chrome-molybdenum infinity chilled ductile iron rolls.