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Dive into the research topics where Yasuhiro Oki is active.

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Featured researches published by Yasuhiro Oki.


Scripta Materialia | 1997

Influence of Si on nano sub-structure of cementite lamellae in pearlitic steel wires

Koichi Makii; H. Yaguchi; Masato Kaiso; Nobuhiko Ibaraki; Y. Miyamoto; Yasuhiro Oki

Abstract Microstructures of hot dip galvanized pearlitic steel wires were investigated by TEM to understand the influence of Si on sub-structure of cementite lamellae in pearlitic steel wires. The following conclusions were obtained: 1. 1) Each single crystal cementite lamella turned into aggregation of nano sub-structure after cold drawing and blueing over 673K. 2. 2) The diameter of the nano sub-cementite is controlled by blueing temperature and Si content.


ATZ - Automobiltechnische Zeitschrift | 2000

Hochfester Walzdraht für die Herstellung von Aufhängungsfedern mit hervorragender Korrosions- Ermüdungsbeständigkeit

Yasuhiro Oki; Takenori Nakayama; Nobuhiko Ibaraki; Atsushi Inada

Dieser Beitrag von Kobe Steel befasst sich mit der Entwicklung eines neuen Aufhangungsfederstahls UHS 1900, der fur eine maximale Schubspannung von 1200 MPa ausgelegt ist und sich durch hervorragende Korrosionsermudungs-Charakteristika auszeichnet. Diese wurde durch erhohten Widerstand gegen Lochfraβkorrosion und Wasserstoffsprodigkeit erreicht. Der Korrosionswiderstand wurde durch Zulegieren von Kupfer, Nickel und Chrom verbessert. Der Widerstand gegen Wasserstoffsprodigkeit wurde erhoht, indem Titan hinzugefugt wurde, was zur Entstehung von Wasserstoff-Einfangstellen fuhrte.


Archive | 1986

High strength and high toughness steel bar, rod and wire and the process of producing the same

Tadayoshi Fujiwara; Yukio Yamaoka; Kazuichi Hamada; Yoshiro Yamada; Yasunobu Kawaguchi; Yasuhiro Oki; Takashi Taniguchi; Hiroyuki Takahashi


Archive | 1995

Hot rolled steel wire rod, fine steel wire and twisted steel wire

Takaaki Minamida; Kozo Katsube; Katsuji Mizutani; Mamoru Murahashi; Kenji Ochiai; Yasuhiro Oki; Nobuhiko Ibaraki; Tamotsu Shohzaki; Yoshihiro Mitani


Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 1997

Influence of Nano Substructure of Cementite Lamellae on the Mechanical Properties of Galvanized Pearlitic Steel Wires

Koichi Makii; Hiroshi Yaguchi; Takaaki Minamida; Masato Kaiso; Nobuhiko Ibaraki; Yasuhiro Oki


Archive | 1997

Method of mechanical descaling and mechanical descaling equipment

Tamotsu Shozaki; Kozo Katsube; Mamoru Murahashi; Katsumasa Tanaka; Yasuhiro Oki


Isij International | 1986

Development of Galvanized High-strength High-carbon Steel Wire

Yukio Yamaoka; Kazuichi Hamada; Hideyoshi Tsubono; Heijiro Kawakami; Yasuhiro Oki; Yasunobu Kawaguchi


Archive | 2010

Coated wire saw

Hiroshi Yaguchi; Kazuo Yoshikawa; Yasuhiro Oki; Takashi Kobori; Mamoru Murahashi; Akinori Uratsuka


Archive | 1993

Hot rolled steel wire rod, extra fine steel wire, stranded steel wire and production of extra fine steel wire

Nobuhiko Ibaraki; Kozo Katsube; Takaaki Minamida; Yoshihiro Mitani; Katsuji Mizutani; Mamoru Murahashi; Kenji Ochiai; Yasuhiro Oki; Tamotsu Shiyouzaki; 芳弘 三谷; 好三 勝部; 高明 南田; 守 村橋; 保 正崎; 勝治 水谷; 信彦 茨木; 憲二 落合; 保博 隠岐


Archive | 1977

Heat treating process for a rod within a fluidized bed

Eiji Takahashi; Masaru Shimizu; Yasuhiro Oki; Osamu Ishigami

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