Proceedings of the 2015 International Conference on Material Science and Applications

Research of Micro-alloyed Microstructure and Composition in X80 Pipeline Steel for High Heat Input Welding

Authors
Jian-Ming Wang, Yan Liu, Kai Wang, Yang Liu
Corresponding Author
Jian-Ming Wang
Available Online June 2014.
DOI
https://doi.org/10.2991/icmsa-15.2015.169How to use a DOI?
Keywords
X80 pipeline steel, Micro-alloying, Chemical composition, Microstructure, High heat input welding.
Abstract
The characteristic of chemical composition of X80 pipeline steel, the microstructure and the existing problems under the condition of high heat input welding were introduced in this paper. The micro-alloyed process of Nb, Ti, V elements in X80 pipeline steel and the influence on the mechanical properties were respectively discussed. In addition, the reasons of the grain coarsening in the welding heat affected zone, the softening and embrittlement in partial microstructure were explored and the corresponding solutions were presented. For X80 pipeline steel, we can see that high strength and high toughness microstructure can be obtained not only by micro-alloyed, but also through the optimization of rolling process and the regulation of cooling rate after hot rolling. X80 pipeline steel with low carbon content and the appropriate micro-alloying, coupled with modern controlled rolling and controlled cooling technology, will have very high strength and toughness. Scholars mainly studied on the composite micro-alloying of Nb and Ti, Al, Ti, Mg, Zr alloy oxides and complex oxide micro-alloying and Ca treatment desulfurization technology, and so on.
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This is an open access article distributed under the CC BY-NC license.

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Proceedings
2015 International Conference on Material Science and Applications (icmsa-15)
Part of series
Advances in Physics Research
Publication Date
June 2014
ISBN
978-94-62520-75-2
ISSN
2352-541X
DOI
https://doi.org/10.2991/icmsa-15.2015.169How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Jian-Ming Wang
AU  - Yan Liu
AU  - Kai Wang
AU  - Yang Liu
PY  - 2014/06
DA  - 2014/06
TI  - Research of Micro-alloyed Microstructure and Composition in X80 Pipeline Steel for High Heat Input Welding
BT  - 2015 International Conference on Material Science and Applications (icmsa-15)
PB  - Atlantis Press
SP  - 911
EP  - 914
SN  - 2352-541X
UR  - https://doi.org/10.2991/icmsa-15.2015.169
DO  - https://doi.org/10.2991/icmsa-15.2015.169
ID  - Wang2014/06
ER  -