Atsuki Okamoto
Sumitomo Metal Industries
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Featured researches published by Atsuki Okamoto.
Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science | 1989
Atsuki Okamoto
Low-carbon (0.06 pet C) and high-carbon (0.50 pet C) Al-killed (AK) steels were prepared by melting high-purity electrolytic iron. They were hot-rolled, cold-rolled, and then batch-annealed for the investigation of microstructure and mechanical properties. It was found that graphitization of cementite took place in steels of extremely low phosphorus and sulfur contents. Graphite was thought to originate in voids formed by cracking of cementite during the cold rolling. It was speculated that in steels of commercial purity, phosphorus and sulfur segregated to the void surface and, thus, suppressed graphitization during the annealing. It was also found that the high-carbon steels became as soft and ductile as low-carbon steels by graphitization.
Isij International | 1995
Hikaru Okada; Tomoki Fukagawa; Haruhiko Ishihara; Atsuki Okamoto; Masatoshi Azuma; Yukio Matsuda
Archive | 1990
Kiyoshi Fukui; Atsuki Okamoto
Isij International | 1998
Jun Haga; Naomitsu Mizui; Tsuneaki Nagamichi; Atsuki Okamoto
Archive | 1991
Masai Nomoto; Koichi Sakurai; Takashi Suzuki; Kiyoshi Fukui; Atsuki Okamoto
Isij International | 1981
Atsuki Okamoto; Masashi Takahashi; Takao Hino
Archive | 1980
Masashi Takahashi; Atsuki Okamoto
Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 1994
Hikaru Okada; Tomoki Fukagawa; Haruhiko Ishihara; Atsuki Okamoto; Masatoshi Azuma; Yukio Matsuda
Archive | 1984
Atsuki Okamoto; Masashi Takahashi
Archive | 1979
Atsuki Okamoto; Masashi Takahashi