Hiroshi Hirano
Kobe Steel
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Publication
Featured researches published by Hiroshi Hirano.
Journal of Mechanical Working Technology | 1983
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
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
Hiroshi Hirano; Masatoshi Sudo; Yoshiyuki Yutori
Archive | 1978
Hiroshi Hirano; Hiroshi Kobayashi; Jiro Jizaimaru; Hidenori Shirasawa
Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 1976
Toshio Matsunaga; Hiroshi Hirano; Masuhiro Sato; Ichiro Kokubo; Kyoichi Katai; Kazuhiko Kourita
Archive | 1976
Hiroshi Hirano; Hiroshi Kobayashi; Jiro Jizaimaru; Hidenori Shirasawa
Archive | 1976
Hiroshi Hirano; Hiroshi Kobayashi; Jiro Jizaimaru; Hidenori Shirasawa
Archive | 1976
Hiroshi Hirano; Hiroshi Kobayashi; Jiro Jizaimaru; Hidenori Shirasawa
Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 1967
Hiroshi Hirano; Masatoshi Sudo; Yoshiyuki Yutori
Archive | 1963
Mamoru Nishihara; Hiroshi Hirano; Yoshiro Yagi