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H 形鋼 R 部の機械的性質の改善

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.11 (1979) No.4

H 形鋼 R 部の機械的性質の改善

Improving the Mechanical Properties of Fillet Part in H-shapes

中西 輝行(Teruyuki Nakanishi) 荒木 正和(Masakazu Araki) 人見 潔(Kiyoshi Hitomi) 阿久根 俊幸(Toshiyuki Akune)

要旨 : H 形鋼 R 部の機械的性質は,断面各位置で最も劣っている。R 部の材質を改善する目的で, 低温度領域で圧縮ひずみや剪断ひずみを与える実験を行い,ひずみ量と材質改善結果の関 連を把握した。実験した圧延方法を実機で応用した結果,R 部の材質は大幅に改善された。 またその改善程度は相当塑性ひずみで説明ができた。 Synopsis :

To improve mechanical properties of the fillet portion known for the lowest performance in all cross-sections of H-shapes, experiment was conducted to increase compression stain and shear strain at low temperatures, and relationships between strain and improved mechanical properties have been studied. Rolling techniques thus found have been applied to actual mills to see wide improvements in mechanical properties of the fillet portion, and the improvements can be attributable to equivalent plastic strain. (c)JFE Steel Corporation, 2003

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