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1. 发明专利

DE60006874T2 未知
公开(公告)号：DE60006874T2
公开(公告)日：2004-10-14
申请号：DE60006874
申请日：2000-02-23
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUKUMORI JUNSO , KAWAMIZU TSUTOMU , KAYA AKIRA , LEE JONG WON , MIN KYUNG ZOON , CHOI WOON YONG
IPC分类号： B21B1/26 , B21B45/02 , B21B45/08
摘要： A system and a method are disclosed for preventing scale defects during hot rolling by hot rolling equipment having a scale breaker (FSB) provided at an entry side of a finishing mill line (F) composed of a plurality of rolling mills (F1 to F7) arranged in tandem. A descaler (D) is provided between a first stage rolling mill (F1) and a second stage rolling mill (F2) of the finishing mill line (F). A cooler (C) for cooling a hot rolled steel plate 1 is provided between the second stage rolling mill (F2) and a third stage rolling mill (F3) of the finishing mill line (F). A control device (8) is provided for controlling the descaler (D) and the cooler (C) to be selectively driven such that neither of the descaler (D) and the cooler (C) is actuated, one of the descaler (D) and the cooler (C) is actuated, or both of the descaler (D) and the cooler (C) are actuated, according to rolling conditions. Thus, the hot rolled steel plate 1 is rolled, with its oxide film thickness at an entry side of the third stage rolling mill (F3) being restricted to not more than a limiting oxide film thickness of 5 mu m. Consequently, scale defects are prevented, and overcooling of the hot rolled steel plate 1 is suppressed, to improve the quality of a product.

2. 发明专利

BR0005304A 未知
公开(公告)号：BR0005304A
公开(公告)日：2001-06-12
申请号：BR0005304
申请日：2000-11-08
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUKUMORI JUNSO , KAYA AKIRA , KAWAMIZU TSUTOMU , MIN KYUNG ZOON , KIM SUNG DOO
IPC分类号： B21C47/28 , B65H75/02 , C21D1/84 , C21D9/00 , C21D9/52 , C21D9/54 , B21B45/00

3. 发明专利

DE60006874D1 未知
公开(公告)号：DE60006874D1
公开(公告)日：2004-01-15
申请号：DE60006874
申请日：2000-02-23
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUKUMORI JUNSO , KAWAMIZU TSUTOMU , KAYA AKIRA , LEE JONG WON , MIN KYUNG ZOON , CHOI WOON YONG
IPC分类号： B21B1/26 , B21B45/02 , B21B45/08
摘要： A system and a method are disclosed for preventing scale defects during hot rolling by hot rolling equipment having a scale breaker (FSB) provided at an entry side of a finishing mill line (F) composed of a plurality of rolling mills (F1 to F7) arranged in tandem. A descaler (D) is provided between a first stage rolling mill (F1) and a second stage rolling mill (F2) of the finishing mill line (F). A cooler (C) for cooling a hot rolled steel plate 1 is provided between the second stage rolling mill (F2) and a third stage rolling mill (F3) of the finishing mill line (F). A control device (8) is provided for controlling the descaler (D) and the cooler (C) to be selectively driven such that neither of the descaler (D) and the cooler (C) is actuated, one of the descaler (D) and the cooler (C) is actuated, or both of the descaler (D) and the cooler (C) are actuated, according to rolling conditions. Thus, the hot rolled steel plate 1 is rolled, with its oxide film thickness at an entry side of the third stage rolling mill (F3) being restricted to not more than a limiting oxide film thickness of 5 mu m. Consequently, scale defects are prevented, and overcooling of the hot rolled steel plate 1 is suppressed, to improve the quality of a product.

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