普通碳素钢超细晶微观组织的特征分析  

Ultrafine Grain Microstructure Characteristics of Plain Low-Carbon Steel

作　　者：王慧敏[1] 杨忠民[1] 车彦民[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081

出　　处：《钢铁研究学报》2006年第10期45-48,62,共5页Journal of Iron and Steel Research

基　　金：国家高技术研究发展计划资助项目(2001AA332020)

摘　　要：用Gleeble热模拟实验机对2种不同成分的普通碳素钢进行实验，实验的过程为：以10℃／s加热到950℃，保温2min，再以10℃／s的冷速降到变形温度（900-600℃），以10s^-1或30s^-1的变形速率进行了变形量为80％的变形，变形后立即水淬。通过光学显微镜和透射电镜观察分析，确定了普通碳素钢利用形变诱导铁素体相变获得的超细晶组织及两相区变形获得的超细晶组织的典型形貌特征。Two kinds of plain low-carbon steels with different chemical composition were investigated on the Gleeble hot deformation simulator. The test specimen is reheated to 950 ℃ at the rate of 10 ℃/s for 2 minutes, then cooled at 10 ℃/s to test temperature, and the test temperature ranges from 900 ℃ to 600 ℃. The strain rates are 10 s^-1 or 30 s^-1 , and the deformation volume is 80%. Through the optical microscope and transmission electron microscope （TEM）, the ultrafine grained microstructure characteristics of plain low-carbon steel obtained by deformation-induced ferrite transformation （DIFT） and deformation in dual phase region were determined.

关 键 词：普通碳素钢 超细晶 微观组织特征 形变诱导铁素体相变 两相区 

分 类 号：TG113.1[金属学及工艺—物理冶金]