Microstructure Characteristics and Mechanical Properties of X80 Pipeline Steels

被引：1
|
作者：
周民 [1 ]
机构：
[1] State Key Lab of Rolling Technology and Automation,Northeastern University
来源：
Journal of Wuhan University of Technology(Materials Science Edition) | 2012年 / 27卷 / 02期
基金：
中国国家自然科学基金;
关键词：
X80 pipeline steel; mechanical properties; higher angle grain boundaries; effective grain size;
D O I：
暂无
中图分类号：
TG142.4 [各种钢材：按用途区分];
学科分类号：
摘要：
The relation between microstructure characteristics and mechanical properties of X80 pipeline steels was investigated using optical microscopy,scanning electron microscopy,etc.It is shown that the structure consists of polygonal ferrite(PF),quasi-polygonal ferrite(QPF),acicular ferrite(AF),and granular bainitic ferrite(GF).With increasing volume fraction of M-A islands(below 3%),the yield strength increases.With increasing content of higher angle grain boundaries(HAGBs),the yield strength,elongation,and DWTT properties at-15 ℃ increase,and the volume fraction of M-A islands reaches its highest point in the steel containing the most volume fraction of GF.
引用
收藏
页码：252 / 255
页数：4
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