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：

080502 ;

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

页码：252 / 255

页数：4

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