Influence of hot deformation on continuous cooling bainitic transformation in a low carbon steel

被引：0

作者：

Wang, Z.D. ^{[1
]}

Wang, G.D. ^{[1
]}

Qu, J.B. ^{[1
]}

Liu, X.H. ^{[1
]}

机构：

[1] Northeastern Univ, Shenyang, China

来源：

Acta Metallurgica Sinica (English Letters) | 1998年 / 11卷 / 02期

关键词：

Bainitic transformations - Cooling - Deformation - Experiments;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The CCT diagrams show that deformation in uncrystallized austenite region can accelerate transformation process. Bainitic transformation in intermediate transformation temperature region is prominent, and the proeutectoid polygonal ferrite transformation at elevated high temperature is suppressed. According to optical and TEM analysis, low carbon bainitic ferrite is characterized by granular and lath-like ferrite, based on the cooling rate and deformation conditions. For non-deformation, groups of coarse parallel ferrite lath form from the prior austenite grain boundaries with the same crystallographic orientation. For heavy deformation, cell structure within the austenite grains due to the high dislocation density formed, which provides more nucleation sites for bainitic ferrite. So, deformation can discontinue the growth of ferrite laths and decrease the length of ferrite laths.

引用

页码：121 / 127