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製缶性に優れた窒素添加高強度極薄缶用鋼板

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川崎製鉄技報

KAWASAKI STEEL GIHO Vol.27 (1995) No.3

製缶性に優れた窒素添加高強度極薄缶用鋼板

Thin-Gauge and High-Strength N-added High-Strength Tin Mill Blackplates with Good Canning Properties

登 坂 章 男(Akio Tosaka) 荒 谷 昌 利 (Masatoshi Aratani) 久 々 湊 英 雄 (Hideo Kuguminato) 要旨 : 3ピース缶胴の成形時の外観不良であるフルーティング(折れ)の発生に及ぼす素材要因, 成形要因について調査した。N添加アルミキルド鋼連続焼鈍材のように固溶Nを強化元素 として活用した時効性を有する鋼を用いた場合であっても,実製缶工程におけるフレクサ ー機能と高速度の成形プロセスによりフルーティングの発生は制御され実用的な問題は生 じない。さらに,固溶強化を利用した鋼板は,成形時は軟質化し優れた成形性・形状連結 性を示すとともに,缶としての使用時は歪み時効により高い缶強度を維持できるため,缶 用鋼板の薄肉化に適している。 Synopsis :

The effect of mechanical properties and deformation conditions on the occurrence of fluting (a kind of Luders strain) at 3-piece can-body making was investigated. Nitrogen added Al-killed continuously annealed steel sheets are applicable without occurrence of fluting and they have good formability. Both of flexor treatment and high speed forming rate of real production device are advantageous for preventing fluting at roll forming. In that case the steel is soft after flexor treatment so that the precision of the shape is improved, but after assembly the proof strength of can body is increased by strain-aging of this steel. Thus this steel is suitable for a thinner gauge can use.

(c)JFE Steel Corporation, 2003

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