|
■■■■■■■■■■■■■■■■■■■ 川崎製鉄技報 KAWASAKI STEEL GIHO Vol.31 (1999) No.1 ■■■■■■■■■■■■■■■■■■■ |
| 薄鋼板研究 10 年の歩み Recent Activities in Research of Steel Sheets 古君 修(Osamu Furukimi) |
| 要旨 : 薄鋼板研究のここ 10 年間の歩みについて，特に新熱間圧延設備を活用した新製品開発を中心に述べる。(1) 超高 r 値冷間圧延鋼板：連続・温間潤滑圧延技術を活用して，r 値 3.0 の冷間圧延鋼板を開発し，難成形部品へ適用している。(2) 590 MPa 級複合組織熱間圧延鋼板：千葉製鉄所第 3 熱間圧延工場の高精度冷却制御技術を適用し，熱間圧延薄物複合組織鋼板を開発した。従来鋼に比較して組織の微細化が図られ，伸び特性が向上した。(3) ハイブリッド強化型複合組織鋼板：上記複合組織鋼の開発思想にさらにフェライト相の TiC による析出強化を組み合わせ，穴拡げ性と耐疲労特性に優れるハイブリッド強化型複合組織鋼板を開発した。(4) 高成形性缶用鋼板：固溶 N を強化元素として活用した高成形性極薄缶用鋼板を開発した。 |
| Synopsis : The research and development activities of sheet steel in the last decade are reviewed by focusing mainly on a viewpoint of newly installed No. 3 hot strip mill at Chiba Works. The new products developed by using No. 3 hot strip mill are as follows: (1) Ultra high r-value cold-rolled sheet steel: Newly developed continuous and warm rolling technique combined with lubrication lead to marvelously high r-value (r 5 3.0) cold rolled sheet steel. This steel has been applied to extra deep drawn shape parts. (2) TS/590 MPa hot-rolled dual phase sheet steel: Subdivided control valves in water cooling zone enabled to control cooling pattern precisely, which lead to new hot-rolled high strength dual phase sheet steel. Mechanical properties, especially total elongation, have been much improved because of fine grains. (3) Hybrid dual phase sheet steel: Combination of the above mentioned dual phase steel and precipitation strengthening by using TiC in ferrite phase lead to hybrid dual phase sheet steel. Hole expanding property and fatigue property have been greatly improved. (4) Highly formable thin steel for can use: Very thin and highly formable cold rolled sheet steel for can use has been developed using solute N. Improved product accuracy in strip gauge and crown using No. 3 hot strip mill backed up the development of the new products. |
| 本文（PDF: 5P/291kb） |