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大形H形鋼用粗形鋼片の新圧延技術の開発

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.13 (1981) No.3

大形H 形鋼用粗形鋼片の新圧延技術の開発

A New Rolling Method of Slabs into Beam Blanks for Large H-shapes

柳沢 忠昭(Tadaaki Yanagisawa) 田中 輝昭(Teruaki Tanaka) 山下 政志(Masashi Yamasita) 奥村 寛(Hiroshi Okumura) 草場 隆(Takashi Kusaba)

要旨 : 大形H 形鋼用に使用する粗形鋼片を従来の鋼塊に替えてスラブから製造する,新しい粗形 鋼片製造技術を開発した。新粗形圧延技術の中心となるのは,スラブを均一なドッグボー ン形状に成形することを目的としたベリー付ボックスカリバによるエッジング技術と,幅 狭のスラブを用いて効率的な粗形鋼片フランジ成形を行うことを目的としたウェブ分割圧 延技術の二つである。新技術を適用し,大形H 形鋼を連鋳製スラブから圧延することが可 能となった。その結果つぎの成果を得た。(1)12%の歩留り(製品/粗鋼)の向上(2)150 ×10**3kcal/t(製品あたり)の省エネルギー(3)製品の内部品質,表面品質の向上(4) 素材の統合・集約による工程の合理化 Synopsis :

A new beam blank rolling method was developed to produce H-shapes from slabs instead of ingots. The one of the key point of this method is to form a homogeneous shape of the dog-bone which is obtained after edging rolling of a slab by calibers with belly and the other imsto form two flanges of a beam blank effectively by web partial rolling, which makes few elongation along the rolling direction during rolling. This development has been applied to produce all series of large H-shapes from continuously cast slabs without using of the blooming mill, on the wide flange beam mill at Mizushima Works. The effects are follws. (a) Improvement on yield (product/crude steel): 12% (b) Energy saving: 150×10**3 kcal/t (c) Improvement on H-shapes quality; Few surface and internal defects

(c)JFE Steel Corporation, 2003

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