一、前言一九五八年大跃进以来,我厂生产的薄板铸铁轧辊实现了球墨化。这样,大大地提高了轧辊强度,减少了辊子在轧钢过程中的折断,提高辊子使用寿命支持了轧钢生产。从1961年来对产品质量要求更加严格。此种轧辊的冷硬层中在精加工时,发现用肉眼不易观察到(不十分仔细检查时)的微渣孔,由于我们在生产冷硬铸件的条件下,对球墨铸铁的特性认识不足和注意的不够,将它与一般冷硬铸铁轧辊的汽砂孔相混淆了,未能及时找到 I. Introduction Since the Great Leap Forward in 1958, the thin cast iron roll produced by our factory has realized the nodularization. In this way, the roll strength is greatly improved, the breakage of the roll in the rolling process is reduced, and the service life of the roll is increased to support the rolling production. From 1961 on the product quality requirements more stringent. In the chilled layer of such a roll, it is found that the micro-slag hole, which is not easily observed with the naked eye (when not being carefully inspected), has been found to be insufficiently aware of the properties of the ductile iron in the production of chilled and hard castings Attention is not enough, it is generally chilled cast iron roll sand vapor hole confused, failed to find