MANUFACTURING METHOD OF HOT ROLLED STEEL SHEET

• Main Authors: TAMAKI KATSUHISA, AKASHI TORU, HIGO TSUYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 23.01.2024
• Subjects: AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

To provide a new manufacturing method of a hot rolled steel sheet capable of reducing variation of a mechanical characteristic in full length and full width of the steel sheet.SOLUTION: In a manufacturing method of a hot rolled steel sheet for manufacturing a high strength steel, a taking-up temperature calculation value in full length and full width, by which a mechanical characteristic of a hot rolled steel sheet to be manufactured becomes a target value, and further variation of the mechanical characteristic falls within an allowable range, is calculated in advance, and at least either of heating and cooling is executed to the hot rolled steel sheet by the taking-up time of the hot rolled steel sheet so that the taking-up temperature of the hot rolled steel sheet agrees with the taking-up temperature calculation value in full length and full width.SELECTED DRAWING: Figure 1 【課題】鋼板の全長全幅における機械特性のバラツキを低減することが可能な、新たな熱延鋼板の製造方法を提供する。【解決手段】高強度鋼を製造する熱延鋼板の製造方法であって、予め、製造する熱延鋼板の機械特性が目標値となり、かつ、機械特性のバラツキが許容範囲内となる全長及び全幅の巻き取り温度計算値を算出し、熱延鋼板の巻き取り温度が全長全幅の巻き取り温度計算値となるように、熱延鋼板の巻き取り前までに、熱延鋼板に対して少なくとも加熱または冷却のうちいずれか一方を実施する。【選択図】図１