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Dive into the research topics where Hiroshi Hirano is active.

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Featured researches published by Hiroshi Hirano.


Journal of Mechanical Working Technology | 1983

Width necking at the rougher in a hot-strip mill.

Hiroshi Hirano; Haruhiro Ibata; Hiroshi Kawatani; Ichiro Kokubo

Abstract The accuracy of the width of a hot strip is very important for the improvement of yield, both for the steel maker and the steel user. One of the important technical problems concerning width accuracy is securing a final hot strip with uniform width along the whole length. In the top or tail portion of a hot strip, a local contraction of width unavoidably occurs, called “width necking” or simply “necking”. The amount of necking is determined mainly by the conditions of rougher rolling in the hot-strip mill. In this paper, the mechanism of necking, the influence of rolling conditions on the amount of necking and the optimum edger-rolling pass schedule are described. The main conclusions obtained are as follows: (i) Necking originates from the uneven distribution of dog-bone height along the length of a slab and the local steep width reduction in the top portion of the slab after edger rolling, but is lessened by the formation of flare during subsequent flat rolling; (ii) the amount of necking increases with the increase of slab width and edging draft and with decrease of slab thickness; and (iii) for the minimization of the amount of necking, heavy width-drafts in the early rougher-rolling stage are preferable to heavy width-drafts in the later rougher-rolling stage.


Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 1956

STUDIES ON THE INGOT MAKING PROCESS IN NITROGEN ATMOSPHER (II)

Takaaki Shimose; Hiroshi Hirano; Katumi Kakiuti

This paper compares results of the nitrogen blowing process with the ordinary and floating boards process for prevention of molten steel from oxidation in pouring process. Results obtained are summarized as follows: 1) Floating boards are not much effective. 2) Nitrogen is effective. 3) Oxidation of molten steel in ingot molds cannot be neglected from consideration of scum formation in ingot molds.


Journal of The Japan Institute of Metals | 1969

Effect of Strain Rates and Pre-strains at Room Temperature on the Mechanical Properties of Austenitic Stainless Steel

Hiroshi Hirano; Masatoshi Sudo; Yoshiyuki Yutori


Archive | 1978

Super mild steel having excellent workability and non-aging properties

Hiroshi Hirano; Hiroshi Kobayashi; Jiro Jizaimaru; Hidenori Shirasawa


Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 1976

Unitized Annealing Department System

Toshio Matsunaga; Hiroshi Hirano; Masuhiro Sato; Ichiro Kokubo; Kyoichi Katai; Kazuhiko Kourita


Archive | 1976

Non-aging super soft steel with an excellent processibility

Hiroshi Hirano; Hiroshi Kobayashi; Jiro Jizaimaru; Hidenori Shirasawa


Archive | 1976

Nicht-alternder superweichstahl mit einer ausgezeichneten verarbeitbarkeit Non-aging super soft steel with an excellent processibility

Hiroshi Hirano; Hiroshi Kobayashi; Jiro Jizaimaru; Hidenori Shirasawa


Archive | 1976

NICHT-ALTERNDER SUPERWEICHSTAHL MIT EINER AUSGEZEICHNETEN VERARBEITBARKEIT

Hiroshi Hirano; Hiroshi Kobayashi; Jiro Jizaimaru; Hidenori Shirasawa


Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 1967

Effect of the Cold Works and Heat Treatments on the Mechanical Properties of 18-8 Stainless Steel Wires

Hiroshi Hirano; Masatoshi Sudo; Yoshiyuki Yutori


Archive | 1963

Verfahren zur Herstellung von magnetischem Eisen-Aluminium-Blech Process for the preparation of magnetic iron-aluminum sheet

Mamoru Nishihara; Hiroshi Hirano; Yoshiro Yagi

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