众所周知,灰铸跌的性能决定于其组织。所有提高灰铸铁性能的方法,都是通过各种工艺途径改善组织来实现的.概括近年来在灰铸铁凝固及其组织方面的研究,评定灰铸铁的组织应从四个方面进行:第一,石墨的类型、分布及尺寸;第二,初生奥氏体组织的数量及形貌;第三,共晶团大小,单位试样断面面积上的共晶团数;第四,基体中珠光体组织的比例及珠光体片间距的大小。 As we all know, the performance of gray cast down depends on its organization. All the ways to improve the performance of gray cast iron are achieved through various technological ways to improve the organization.Considering the recent research on the solidification of gray cast iron and its microstructure, the evaluation of gray cast iron organization should proceed from four aspects: First, graphite Secondly, the number and morphology of primary austenite; third, the size of eutectic, the number of eutectic clusters on the cross-sectional area of ​​the sample; fourthly, the amount of pearlite in the matrix Ratio and the size of pearlite sheet pitch.