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高張力冷延鋼板のプレス加工性

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.12 (1980) No.4

高張力冷延鋼板のプレス加工性

Press Formability of High Strength Cold-Rolled Steel Sheets

安部 英夫(Hideo Abe) 山本 健一(Ken-ichi Yamamoto) 中川 吉左衛門(Kichizaemon Nakagawa) 要旨 : 自動車の車体重量軽減,省エネルギーに有効な,加工性が優れた 2 種類の高張力冷延鋼板 を開発した。2 相複合組織鋼 (CHLY) とγ値の高い P 添加 AI キルド鋼 (CHR) である。 これらのプレス加工性につて,従来鋼 (APFC) と比較して調査した。各種高張力鋼板のひ ずみ伝播性,形状凍結性 (スプリングバックを含む),張り出し成形性,絞り成形性,伸び フランジ性,耐しわ性,張り剛性,耐デント性およびハット型断面部材の曲げ強度につい て論理的および実験的に比較し,それぞれの特徴と適正用途について論じた。 Synopsis :

Formable high strenght steel effctive in reducing automobile body weigh with a potential saving in fuel have been developed in two types: one is a dual-phase steel, "CHLY", and the other a rephosphorized AI-killed steel with high γ-value, "CHR". In comparint these two steels with the conventional steel, "APFC", the authors made both theoretical and experimental studies on press formability, stiffness and strength of these steels, in terms of strain propagation property, shape fixability, springback, stretch formability, deep drawability stretch flanging formability, resistance to wrinkle, panel stiffness, dent resistance, and bending strength of hat section beam. The suitability of each steel for auto-body parts is also discussed.

(c)JFE Steel Corporation, 2003

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