自从球墨铸铁投入工业生产以来,铸造工作者一直在探索球化率快速测定法,希望在铁水浇注之前就能判断石墨球化情况。利用坩锅试样标准凝固曲线判断球化率的方法在实践中并未获得满意的结果。本文所报导的这种新方法是根据数值比较小的材料导热率,用计算机在3分钟内报出球化率。 Since ductile cast iron has been put into industrial production, foundry workers have been exploring the rapid determination of spheroidization rate, hoping to determine the state of graphite spheroidization prior to hot metal pouring. The method of using the standard solidification curve of crucible sample to judge the spheroidization rate has not obtained satisfactory results in practice. The new method reported in this paper is based on the thermal conductivity of the material, which is relatively small in value, and the rate of spheroidization is reported by the computer in 3 minutes.