TY - GEN
T1 - Advanced titanium oxide steel with excellent HAZ toughness for offshore structures
AU - Fukunaga, Kazuhiro
AU - Chijiiwa, Rikio
AU - Watanabe, Yoshiyuki
AU - Kojima, Akihiko
AU - Nagai, Yoshihide
AU - Mamada, Nobuhiko
AU - Adachi, Toshihiko
AU - Date, Akihiro
AU - Taniguchi, Syunsuke
AU - Uemori, Ryuji
AU - Nishimura, Seiji
PY - 2010/12/1
Y1 - 2010/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=80053955858&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053955858&partnerID=8YFLogxK
U2 - 10.1115/OMAE2010-20319
DO - 10.1115/OMAE2010-20319
M3 - Conference contribution
AN - SCOPUS:80053955858
SN - 9780791849149
T3 - Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
SP - 63
EP - 71
BT - ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2010
T2 - ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2010
Y2 - 6 June 2010 through 11 June 2010
ER -