利用高炉铁水直接生产球铁铸件可大大节约能源,降低生产成本,但高炉铁水的碳当量一般比冲天炉铁水高得多,直接铸造容易出现石墨漂浮缺陷,因此,试验探讨石墨漂浮机理并寻求其克服方法是高炉铁水直接利用的关键,为此,我们在绍兴矿冶厂进行了有关试验。试验直接引取高炉铁水(CE≥4.5％),经球化处理后以砂型浇注直立的圆柱形试件Ⅰ Direct production of ductile iron castings from blast furnace hot metal can greatly save energy and reduce production costs. However, the carbon equivalent of blast furnace hot metal is generally much higher than that of cupola furnace, and direct casting tends to lead to graphite floating defects. Therefore, the mechanism of graphite floating is explored and sought To overcome the method is the key to direct use of blast furnace hot metal, for which we carried out the relevant tests in Shaoxing Mining and Metallurgical Plant. The test directly draws blast furnace hot metal (CE≥4.5%), after spheroidization treatment, casts upright cylindrical test piece I