Precipitation behaviors of X80 acicular ferrite pipeline steel

被引：0

作者：

Zhao, Ai-min ^{[1
]}

Wang, Yan ^{[1
]}

Chen, Yin-li ^{[1
]}

Tang, Di ^{[1
]}

Gao, Xu-tao ^{[1
]}

Zuo, Bi-qiang ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Res Inst Met Engn, Beijing 100083, Peoples R China

[2] WISDRI Engn & Res Incorp Ltd Co, Rolling Mill Business Div, Wuhan 430223, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2011年 / 18卷 / 03期

关键词：

pipeline steel; precipitation; ferrite; carbonitride; dissolution; STRAIN-INDUCED PRECIPITATION; MICROALLOYED HSLA STEELS; NB; AUSTENITE; EVOLUTION; KINETICS;

D O I：

10.1007/s12613-011-0439-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The precipitation behaviors of X80 acicular ferrite pipeline steel were investigated by using transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS). The results show that dendritic precipitates in the as-cast steel slabs precipitate mainly in grain boundaries, and these dendritic precipitates dissolve and re-precipitate to two kinds of carbonitrides: Ti- and Nb-rich (Ti, Nb)(C, N) carbonitrides during reheating. Four types of precipitates mainly exist in the hot rolled plate: Ti-rich carbonitrides resulted from the dendritic carbonitrides undissolved during the reheating process; Ti-rich carbonitrides re-precipitated along austenite grain boundaries during the reheating process; NbC carbides mainly heterogeneously nucleated on the small pre-existing Nb-rich carbonitrides in the hot rolling process; and NbC carbides precipitated on dislocations during hot rolling.

引用

页码：309 / 313

页数：5

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