Dilatometric Analysis of Phase Fractions during Austenite Decomposition in Pipeline Steel

DOI

10.2991/ic3me-15.2015.380How to use a DOI?

Keywords

Dilatometry; Austenite decomposition; Pipeline steel; Phase fraction

Abstract

Dilatometry is one of the most popular methods for the study of high temperature physical properties of steel and thermal expansion is considered to be an important factor concerning on the crack formation during casting and rolling for pipeline steel. In the present study, dilatometric curve of X60 pipeline steel was measured with the Gleeble-1500 hot simulator. Phase transformation kinetics of austenite decomposition was analysed with the lever rule based on a suggested model. The tested X60 specimen was found to be about 80% of bainite and about 20% of ferrite at room temperature, which is proved by the OM fractography. Precipitation of proeutectoid ferrite film along austenite grain boundary may be responsible for high-temperature brittleness of pipeline steel.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Ye-Jin Yang
AU  - Jian-Xun Fu
AU  - Ren-Jie Zhao
AU  - Yan-Xin Wu
PY  - 2015/08
DA  - 2015/08
TI  - Dilatometric Analysis of Phase Fractions during Austenite Decomposition in Pipeline Steel
BT  - Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering
PB  - Atlantis Press
SP  - 1974
EP  - 1978
SN  - 2352-5401
UR  - https://doi.org/10.2991/ic3me-15.2015.380
DO  - 10.2991/ic3me-15.2015.380
ID  - Yang2015/08
ER  -