Kazuhiro Fukunaga
Nippon Steel
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Featured researches published by Kazuhiro Fukunaga.
ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2010 | 2010
Kazuhiro Fukunaga; Rikio Chijiiwa; Yoshiyuki Watanabe; Akihiko Kojima; Yoshihide Nagai; Nobuhiko Mamada; Toshihiko Adachi; Akihiro Date; Syunsuke Taniguchi; Ryuji Uemori; Seiji Nishimura
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.Copyright
Archive | 2005
Kazuhiro Fukunaga; Yasushi Mizutani; Rikio Chijiiwa; Yoshiyuki Watanabe
Archive | 2010
Yoshiyuki Watanabe; Kazuhiro Fukunaga; Akihiko Kojima; Ryuji Uemori; Rikio Chijiiwa
Archive | 2008
Rikio Chijiiwa; Ryuji Uemori; Yoshiyuki Watanabe; Kazuhiro Fukunaga; Akihiko Kojima; Yoshihide Nagai
Archive | 2005
Rikio Chijiiwa; Kazuhiro Fukunaga; Yoshihide Nagai; Ryuji Uemori; Yoshiyuki Watabe; 力雄 千々岩; 龍治 植森; 義之 渡部; 和洋 福永; 嘉秀 長井
Archive | 2005
Rikio Chijiiwa; Kazuhiro Fukunaga; Ryuji Uemori; Yoshiyuki Watabe; 力雄 千々岩; 龍治 植森; 義之 渡部; 和洋 福永
Archive | 2009
Kazuhiro Fukunaga; Ryuji Uemori; Yoshiyuki Watanabe; Yoshihide Nagai; Rikio Chijiiwa
Archive | 2006
Rikio Chijiiwa; Kazuhiro Fukunaga; Ryuji Uemori; Yoshiyuki Watabe; 力雄 千々岩; 龍治 植森; 義之 渡部; 和洋 福永
Archive | 2007
Kazuhiro Fukunaga; Yasushi Mizutani; Rikio Chijiiwa; Yoshiyuki Watanabe
Archive | 2006
Kazuhiro Fukunaga; Ryuji Uemori; Yoshiyuki Watabe; 龍治 植森; 義之 渡部; 和洋 福永
