Microstructure and Deformation Characteristics of X80 High Deformability Pipeline Steel

被引：1
|
作者：
Meng De Liang [1 ]
Kang Yong Lin [1 ]
An Shou Yong [2 ]
Xia Dian Xiu [2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Technol Ctr Jinan Iron & Steel Co LTD, Jinan 250101, Peoples R China
来源：
MATERIALS AND MANUFACTURING, PTS 1 AND 2 | 2011年 / 299-300卷
关键词：
Pipeline steel; High deformability; Multiphase steel; Work hardening; LINEPIPE;
D O I：
10.4028/www.scientific.net/AMR.299-300.323
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Two kinds of X80 high deformability pipeline steels have been processed by applying two-stage cooling process (TSC) and heat treatment on-line process (HOP). The microstructure of TSC steel and HOP steel are polygonal ferrite (PF) + quasi-polygonal ferrite (QF) + granular bainite (GB) multiphase and QF + GB+ martensite-austenite (M/A) multiphase respectively. In HOP steel, the volume of M/A is much more and the size is much larger than that in TSC steel. Some degenerated M/A constituents are also observed in HOP steel. The HOP steel has shown higher tensile strength, lower yield ratio and lower uniform elongation than TSC steel. The strain-n(1) (instantaneous n-value) curve of HOP steel could be divided into two stages and the TSC's could be separated to three stages.
引用
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页码：323 / +
页数：2
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