Microstructure characteristics and mechanical properties of X80 pipeline steels

被引：0
作者：
Min Zhou
Linxiu Du
Yanfeng Zhao
Xianghua Liu
机构：
[1] Northeastern University,State Key Lab of Rolling Technology and Automation
来源：
Journal of Wuhan University of Technology-Mater. Sci. Ed. | 2012年 / 27卷
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：
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.
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页码：252 / 255
页数：3
相关论文
共 36 条
[1]  
Corbett K. T.(2004)High-strength Steel Pipeline Economics [J] International Journal of Offshore and Polar Engineering 14 75-80
[2]  
Bowen R. R.(2004)Development and Mechanical Properties of X120 Linepipe [J] International Journal of Offshore and Polar Engineering 14 1 421-1 427
[3]  
Petersen C. W.(2009)Relation among Rolling Parameters, Microstructures and Mechanical Properties in an Acicular Ferrite Pipeline Steel [J] Materials & Design 30 3 436-3 443
[4]  
Okaguchi H. M. S.(2003)Continuous Cooling Transformation of Undeformed and Deformed Low Carbon Pipeline Steels [J] Materials Science and Engineering A 355 126-136
[5]  
Hamada M.(2006)Challenge of Mechanical Properties of an Acicular Ferrite Pipeline Steel [J] Materials Science and Engineering: A 431 41-52
[6]  
Wang W.(2005)Dynamic Deformation Behavior of Ultrafi ne-grained Low-carbon Steels Fabricated by Equal-channel Angular Pressing [J] Metallurgical and Materials Transactions A 36A 389-397
[7]  
Yan W.(2005)Acicular Ferritic Microstructure of a Low-carbon Mn-Mo-Nb Microalloyed Pipeline Steel [J] Materials Characterization 54 305-314
[8]  
Zhu L.(2003)Analysis of Different Acicular Ferrite Microstructures Generated in a Medium-carbon Molybdenum Steel [J] Materials Science and Engineering A 363 316-324
[9]  
Zhao M.-C.(2005)Effective Grain Size and Charpy Impact Properties of High-toughness X70 Pipeline Steels [J] Materials Science and Engineeing A 36 2 107-2 114
[10]  
Yang K.(1993)Interrelations of Strength-Toughness and Retained Austenite Mechanical Stability in Granular Bainite [J] Transactions of Materials and Heat Treatment 14 14-19
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