摘要
利用光学金相显微镜结合透射电镜薄膜分析详细研究了低碳钢中铁素体相的动态回复过程。试验结果表明存在两种铁素体亚结构的发展途径:当应变速率较低时,随着应变的增加,铁素体亚晶粒逐步细化并始终保持等轴状;当应变速率较高时,铁素体晶粒内先形成层状亚结构,在随后的变形过程中再转变为等轴亚晶。
The dynamic recovery of ferrite in a low carbon steel has been investigated using optical microscope (OM) and transmission electron microscope (TEM). Two different processes in the development of substructure of ferrite has been found when the steel is compressed in ferrite-austenite range: At relatively low strain rate(0. 002 s^(-1),low angle subboundaries gradually form within the earlier-formed large equiaxed subgrains,and hence subdividing them into finer subgrains until equilibrium state is reached;At high strain rate(0. 2 s^(-1),layered substructures form at the initial stage of deformation, which gradually change into equiaxed subgrains.
出处
《理化检验（物理分册）》
CAS
1994年第4期13-14,21,共3页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
低碳钢
高温变形
动态回复
铁素体
Low carbon steel, Hot deformation, Dynamic recovery
