物理模拟大断面球墨铸铁中异常石墨形态的观测  

Observation of Abnormal Graphite Shape in Ductile Iron with Heavy Section by Using Physical Simulation

作　　者：赵凌[1] 杨弋涛[1] 刘洋[1] 邵光杰[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《铸造技术》2006年第2期111-114,共4页Foundry Technology

基　　金：上海市教委高校科技发展基金(04-58-04AB76)

摘　　要：使用自行研制的大断面铸件冷却模拟装置,研究了不同共晶时间球墨铸铁样品的石墨形态及相关的力学性能。验证了这一装置对于厚大断面球铁铸件研究的有效性。随着共晶时间的延长,铸件的石墨形态逐渐偏离球形,向异常化趋势发展,石墨颗粒的圆整度随之降低。异常石墨的形态表现出相互联结的立体网络状。The graphite morphologies and the relevant mechanical properties of ductile iron sample with different eutectic times was studied by using the self-developed cooling apparatus for simulating the casting with heavy section. The validity of the apparatus to the research on the solidification behavior of ductile iron with heavy section was verified. As the eutectic time increases, the graphite morphology departs from sphericity to the abnormal morpholgy, and the roundness of the graphite particles decreases as well. The morphology of abnormal graphites has the three-dimensional interconnection netlike structure,

关 键 词：大断面 球墨铸铁 冷却模拟 石墨形态 

分 类 号：TG255[金属学及工艺—铸造]