准铸态贝氏体低碳球铁的组织分析  

Analysis on Microstructure of Quasi-as-cast Bainite Low Carbon Ductile Iron

作　　者：舒信福[1] 张晓龙[1] 常殿存[1] 舒蕊[1] 朱延东[1] 李铃芳[1] 

机构地区：[1]昆明理工大学材料加工专业,云南昆明650093

出　　处：《金属热处理》2005年第10期88-91,共4页Heat Treatment of Metals

基　　金：云南省自然科学基金重点项目(1999E0004Z)

摘　　要：采用扫描电镜和X射线衍射仪对准铸态贝氏体低碳球铁的组织结构、断口形貌和微区成分进行了分析和研究.结果表明,经准铸态贝氏体工艺处理后,低碳球铁的基体组织以针状无碳贝氏体为主,并有25%～28%的奥氏体;准铸态贝氏体低碳球铁韧塑性的提高,与其组织中形成的大量奥氏体和镶嵌在当中的针状无碳贝氏体密切相关.The microstructure, fracture appearance and microareas＇ composition of the quasi-as-cast bainite low carbon ductile iron were analyzed and studied with SEM and X-ray diffraction. The results show that the matrix of the low carbon ductile iron is mainly acicular carbon-free bainite structure with some austenite （about 25% -28% ） after the quasi-ascast bainite process;The enhancement of toughness and plasticity of quasi-as-cast bainite low carbon ductile iron is contributed by the large amount of austenite and acicular carbon-free bainite inlaying in the austenite.

关 键 词：低碳球铁 准铸态贝氏体 组织 

分 类 号：TG113.1[金属学及工艺—物理冶金] TG164.2[金属学及工艺—金属学]