Mechanical Properties and Microstructure Comparative Analysis of 500MPa Hot Rolled H-Section Different Positions for Ultra-Deep well Platform

With the increase of drilling depth, the mechanical properties of H-section steel used in drilling platform are more and more demanding. In this paper, the strength, low temperature impact toughness, plasticity, micro-hardness and microstructure of 500MPa hot rolled H-section steel produced by TMCP...

Full description

Saved in:
Bibliographic Details
Published inMaterials science forum Vol. 1035; pp. 464 - 472
Main Authors Li, Fang Po, Wang, Jian Jun, Feng, Yao Rong, Han, Li Hong, Zhang, Hui, Yang, Shang Yu, Lu, Cai Hong
Format Journal Article
LanguageEnglish
Published Trans Tech Publications Ltd 22.06.2021
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:With the increase of drilling depth, the mechanical properties of H-section steel used in drilling platform are more and more demanding. In this paper, the strength, low temperature impact toughness, plasticity, micro-hardness and microstructure of 500MPa hot rolled H-section steel produced by TMCP process were analyzed, and the strengthening mechanism was also studied. The results show that flanges of TMCP hot rolled H-section steel had the best strength and toughness, while the yield strength at web and R Angle was reduced to 91% and 78% of the flange, respectively. The impact toughness at -40°C of web and R Angle was reduced to 86% and 38% of the flange , and the micro-hardness reduced to 91% and 85% of the flange, respectively. The main strengthening mechanism of the TMCP hot rolled H-section steel is fine-grain strengthening, the carbonitride of V precipitation strengthening and surface bainite transformation strengthening.
Bibliography:Selected peer-reviewed papers from the 21st Chinese Materials Conference 2020(CMC2020), November 17-22, 2020, Beijing, China
ISSN:0255-5476
1662-9752
1662-9752
DOI:10.4028/www.scientific.net/MSF.1035.464