一、前言D 型石墨铸铁(以下简称 D 墨铸铁)不仅比 A 型石墨铸铁有更高的强度且有更高的切削加工性和致密性,是制造空压机、制冷机等部件的理想材料。它已越来越为人们所关注。我们在本刊1986年第一期发表的“D 型石墨含量对灰铸铁强度的影响”(以下简称上文)一文中已较详细地论述了 D 墨铸铁的组织特点及其形成机理和其含量与铸铁强度的关系。本文在此基础上根据 D 墨铸 I. Introduction D-type graphite cast iron (hereinafter referred to as D-graphite cast iron) not only has a higher strength than A-type graphite cast iron but also has higher machinability and compactness. It is the ideal material for the manufacture of components such as air compressors and refrigerators . It has become more and more people’s attention. We in the first issue of 1986, “D-type graphite content on the strength of gray cast iron” (hereinafter referred to as a) has been discussed in more detail on the D-type cast iron organization and its formation mechanism and its content Relationship with the strength of cast iron. This article is based on D inkcasting