高碳低合金钢中共析渗碳体微观结构的TEM研究  

TEM INVESTIGATION ON MICROSTRUCTURES OF EUTECTOID CEMENTITE IN HIGH CARBON LOW ALLOY STEELS

作　　者：朱晓东[1] 李承基[1] 章守华[1] 邹明[2] 苏世怀[2] 

机构地区：[1]北京科技大学材料科学与工程系,北京100083 [2]攀枝花钢铁[集团]公司,攀枝花617067

出　　处：《金属学报》1998年第1期31-38,共8页Acta Metallurgica Sinica

基　　金：国家经贸委重点科技开发项目经费!资助课题KF94-04-01-1-3

摘　　要：用透射电镜对几种高碳低合金钢中的共析渗碳体进行了观察发现渗碳体片不是均一的.在共析渗碳体内存在一些取向一致、宽度不等的铁素体亚片层、这些铁素体亚片层可把片状共析渗碳体隔断铁素体亚冲层所在平面的指数以｛211｝F为多.本文还分析比较了常见的条纹衬度与铁素体亚片层的区别。The eutectoid cementite in several rail steels has been studied by means of TEM.It was found that the eutectoid cementite lamellae arc not of homogeneous structure but contain some ferrite sub-lamellae with different widths and same orientation. The continuity of the eutectoid cementite lamellae was reduced when the ferrite sub-lamellae were incorporated. The planar indices of the ferrite sub-lamellae are found usually close to {211}F.Some contrast fringes observed at the cementite/ferrite interface were analyzed and compared with the sub-lamellae in the eutectoid cementite. The formation mechanism of ferrite sub-lamellae in eutectoid cementite was also discussed.

关 键 词：珠光体 共析渗碳体 共析铁素体 高碳低合金钢 

分 类 号：TG142.33[一般工业技术—材料科学与工程]