铸态珠光体球墨铸铁组织形态与性能  

Study on Structure Morphology and Properties of Pearlite Nodular Cast Iron

作　　者：朱先勇[1] 刘耀辉[2] 张英波[1] 宋雨来[1] 

机构地区：[1]吉林大学材料科学与工程学院 [2]吉林大学教育部汽车材料重点实验室

出　　处：《农业机械学报》2007年第2期179-182,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：长春市科技局资助项目(项目编号:2004176)

摘　　要：在普通球墨铸铁的基础上，加入Cu、Sb合金元素，通过余温正火工艺，获得铸态珠光体球墨铸铁。该铸铁的珠光体含量大于（等于）95％，渗碳体小于（等于）5％，抗拉强度可达700-850MPa，硬度为280-350HB，延伸率为3％～5％。扫描电镜及透射电镜分析表明，当加入0．5％Cu、0．02％Sb时，合金主要由珠光体与球状石墨组成，其中铸态珠光体层片间距变小，石墨球细小而均匀，铁素体的形成受到抑制。Based on common nodular cast iron, a pearlite nodular cast iron was obtained by normalizing and adding alloying elements of Cu, Sb. The content of pearlite in alloy exceeded 95% and the content of cementite was under 5%. The tensile strength of this cast iron was up to 700-850 MPa, hardness was 280-350 HB and the specific elongation was 3%-5%. The morphology of pearlite in Cu, Sb pearlite nodular cast iron was studied by transmission electron microscope （TEM） and scanning electron microscope （SEM）. The results indicated that the lamellar spacing in pearlite and the dimension of nodular were smaller, and the information of ferrite was impeded due to the addition of 0.5 % Cu and 0.02 %Sb.

关 键 词：铸态球墨铸铁 珠光体形态 铜锑合金化 性能 

分 类 号：TG143.5[一般工业技术—材料科学与工程]