第一重型机器厂研制的φ658×1700毫米离心复合高镍铬钼无限冷硬铸铁轧辊,在鞍山钢铁公司1700毫米连轧精轧机组上试用结果表明:每根平均轧钢量达12万多吨,最高轧钢量达到19.5万多吨,比国内轧辊最高轧钢量还多1500多吨,并且各项技术指标均达到了技术要求。此种轧辊的制造技术在国内处于领先地位。这种铸铁轧辊是国家机械委科研课题,是为国家重点项目——宝钢二期工程设备2050热连轧机而研制的。要求辊面硬度达到Hs70～80,辊芯强度σ_b≥22kg/mm~2,外层为高镍铬钼无限冷硬铸铁,芯部为高强度孕育铸铁。这两种材质成份要求严,浇注温度高,要求用两 The first heavy machinery factory developed φ658 × 1700 mm centrifugal composite high nickel chrome molybdenum unlimited chilled cast iron roller in 1700 mm Anshan Iron and Steel Group finishing trial results show that: the average volume of each rolling more than 120,000 tons, The highest volume of steel rolling reached more than 195,000 tons, more than 1,500 tons more than the maximum rolling capacity of the domestic roll, and the technical indicators have reached the technical requirements. Such a roller manufacturing technology in the country in a leading position. This kind of cast iron roller is the research topic of the State Mechanical Commission, which is developed for the national key project - Baosteel Phase II Engineering Equipment 2050 Hot Rolling Mill. Requires roller hardness reaches Hs70 ~ 80, core strength σ_b ≥ 22kg / mm ~ 2, the outer layer of high-chrome molybdenum infinity chilled cast iron, the core of high-strength cast iron. These two material components demanding, pouring temperature is high, requiring two