如何控制球铁的质量,尤其是如何控制球化等级,一直是当前铸造工作者关心的问题。近年来,在炉前测报球化率方面进行了不少研究,相继出现了快速金相、热分析、比电阻、膨胀曲线、相对导热率等方法,但由于多种原因,这些方法的测报准确率只达到85％左右。在生产上,尤其是在大量流水线生产上应用,还存在一定困难。本文提出一种新的设想,采用与标准球化等级的试棒进行相对比较的方法,来判断球化处理后的 How to control the quality of ductile iron, especially how to control the grade of spheroidization, has always been a concern of the current foundry workers. In recent years, many studies have been made on the measurement of spheroidization rate in the furnace. One of the methods has been rapid metallurgy, thermal analysis, specific resistance, expansion curve and relative thermal conductivity. However, for many reasons, the accuracy of these methods is accurate Rate only reached about 85%. In production, especially in a large number of assembly line production, there are still some difficulties. This paper presents a new idea, using a standard ball with the level of the test bar relative comparison method to determine the ball after the treatment