A型和D型石墨合金灰铸铁断口形貌对比研究  

An Investigation on Fracture Morphology Differences between Gray Irons with A-Type and D-Type Graphite

作　　者：何毅[1] 沈保罗[2] 李莉[3] 曾勇[3] 岳昌林[3] 

机构地区：[1]四川大学分析测试中心,四川成都610064 [2]四川大学材料科学与工程学院,四川成都610064 [3]成都金顶凸轮轴铸造有限公司,四川郫县611732

出　　处：《现代铸铁》2009年第2期85-88,共4页Modern Cast Iron

摘　　要：介绍了D型石墨的合金灰铸铁在国内外的应用情况,以及试验生产A型和D型石墨Cr-Ni-Cu合金灰铸铁的方法,检查结果:A型石墨合金灰铸铁中的石墨较粗大;另外,在化学成分相近的情况下,D型石墨合金灰铸铁具有更高的抗拉强度。分析认为两种合金灰铸铁的断口主要是由于片状石墨解理以及石墨/基体之间的界面分离造成的,其中D型石墨合金灰铸铁断口表面的显微疏松更少,枝晶更发达,这正是其具有更高强度、适于制造液压元件的原因。The application situation of D-type graphite gray iron at home and abroad and the method to obtain Cr-Ni-Cu alloyed gray irons with both A-type graphite and D-type graphite was introduced.The test results showed that the fracture of both alloyed gray irons were caused mainly by the cleavage of flake graphite and separation of interface between graphite and matrix,and it was found that the fracture surface of D -type graphite iron has less micro porosities and more developed dendrite that just is the right r...

关 键 词：A型石墨 D型石墨 合金灰铸铁 断口形貌 

分 类 号：TG251[金属学及工艺—铸造]