石墨球形态对球墨铸铁弹性模量的影响  

Effect of Elastic Modulus of Ductile Cast Iron on Graphite Morphology

作　　者：孙泽涛[1] 高丽丽[2] 

机构地区：[1]山东劳动职业技术学院,山东济南250022 [2]山东大学材料科学与工程学院,山东济南250022

出　　处：《热加工工艺》2011年第19期34-38,共5页Hot Working Technology

摘　　要：以QT700为对象通过拉伸试验、压缩试验、扫描电镜分析、金相分析、差热分析(DSC)和热膨胀性能测试(DIL)探讨了QT700的弹性模量、力学性能、显微结构及热性能之间的关系。结果表明:球墨铸铁的弹性模量、抗拉强度及球化率相关;材料的热性能、塑韧性与石墨球的尺寸有一定关系;DSC曲线与珠光体含量存在一定关系。The elastic modulus,mechanical performance,microstructure and thermal properties of QT700 were studied by tensile test,compression test,SEM obseroation,DSC analysis and thermal expansion test.The results show that,the elastic modulus of ductile cast iron has relationship with spheroidization rate and breaking strength.The thermal properties and plasticity are interrelated with the size of graphite ball.The DSC curve is related with pearlite content.

关 键 词：球墨铸铁 弹性模量 微观组织结构 力学性能 热性能 

分 类 号：TG113.25[金属学及工艺—物理冶金]