Microstructure Characteristics and Mechanical Properties of X80 Pipeline Steels

被引：14
|
作者：
Zhou Min [1 ]
Du Linxiu [1 ]
Zhao Yanfeng [1 ]
Liu Xianghua [1 ]
机构：
[1] Northeastern Univ, State Key Lab Rolling Technol & Automat, Shenyang 110004, Peoples R China
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; DEFORMATION-BEHAVIOR; X70;
D O I：
10.1007/s11595-012-0447-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
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 degrees C 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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