Advanced titanium oxide steel with excellent HAZ toughness for offshore structures

Kazuhiro Fukunaga, Rikio Chijiiwa, Yoshiyuki Watanabe, Akihiko Kojima, Yoshihide Nagai, Nobuhiko Mamada, Toshihiko Adachi, Akihiro Date, Syunsuke Taniguchi, Ryuji Uemori, Seiji Nishimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The feature of titanium oxide steel (Ti-O steel) is that heat affected zone (HAZ) toughness is improved due to the refinement of HAZ microstructure through the formation of intragranular ferrite (IGF). This desirable microstructure, IGF, forms radially from titanium oxide particles. Recently, it has been clarified that manganese in Ti-O steel is an indispensable element for the formation of IGF. Therefore, manganese effects on Ti-O steel have been basically studied in this work, and then a new effect has been found. In Ti-O steel, manganese has the effect of suppressing the formation of ferrite side plates (FSP), which are undesirable due to their coarseness. Consequently, HAZ microstructure of Ti-O steel with high manganese content is so refined that HAZ toughness is remarkably improved. Based on the manganese effects, steel plates with excellent HAZ toughness for offshore structures have been developed and commercially mass-produced. The welded joints exhibit excellent toughness.

Original languageEnglish
Title of host publicationASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2010
Pages63-71
Number of pages9
DOIs
Publication statusPublished - Dec 1 2010
Externally publishedYes
EventASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2010 - Shanghai, China
Duration: Jun 6 2010Jun 11 2010

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume6

Other

OtherASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2010
CountryChina
CityShanghai
Period6/6/106/11/10

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

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  • Cite this

    Fukunaga, K., Chijiiwa, R., Watanabe, Y., Kojima, A., Nagai, Y., Mamada, N., Adachi, T., Date, A., Taniguchi, S., Uemori, R., & Nishimura, S. (2010). Advanced titanium oxide steel with excellent HAZ toughness for offshore structures. In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2010 (pp. 63-71). (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 6). https://doi.org/10.1115/OMAE2010-20319