铸铁中微量元素分布规律的异化及应用  

Dissimilation of Trace Elements Distribution in Cast Iron and Its Application

作　　者：李树江[1] 陈历祥[1] 卢月美[1] 林小瑛[1] 陈绍春[1] 

机构地区：[1]福州大学,福建福州350002

出　　处：《现代铸铁》2003年第5期55-57,共3页Modern Cast Iron

摘　　要：Pb、As、Sn等微量元素在不同形态的石墨区域中有不同的分布规律;在A型石墨区偏聚在基体中,在D型石墨区偏聚在石墨上。利用这两种分布规律,制取含Pb、As、Sn D型石墨铸铁,使Pb、As、Sn主要聚集在石墨上,微量残留在基体中,可以获得良好的力学性能。The distribution regularities of some trace elements such as Pb,As and Sn in areas of different morphologies of graphite were found different: the trace elements concentrated within the matrix structure in the A-type graphite area;they concentrated, however, on the graphite in the D-type graphite area.Applying these distribution characteristics of trace elements,it is possible to produce Pb,As,Sn -containing D-type graphite cast iron having excellent mechanical properties.The most amount of trace elements in this type of cast iron would concentrate on the graphite and lose their harmful effect, however, a little amount of them would be retained in the matrix structure and have the effect to increase the mechanical properties.

关 键 词：铸铁 微量元素 D型石墨铸铁 分布规律 力学性能 

分 类 号：TG143[一般工业技术—材料科学与工程] TG25[金属学及工艺—金属材料]